appliquer un js à un formulaire

Bonjour,

J'ai réaliser un formulaire et j'ai récupérer un modéle de css ainsi que le javascript pour mettre en forme le formulaire et donner un aspect agréable au input, select, etc.

seulement depuis en associant le js la mise en forme sur les champs ne fonctionne pas.
pour la css elle s'applique correctement mais pas pour les champ input ect...

je vous met une partie de mon formulaire :

form.php

Code:

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<html>
 
<head>
<script language="javascript" type="text/javascript" src="niceforms.js"></script>
<link rel="stylesheet" type="text/css" media="all"
	href="niceforms-default.css" />
</head>
 
<body>
 
<div id="container">
<form method="post" action="../bdd/insert.php" name="formulaire"
	onsubmit="if (testChamps()) return (verif_before_valid_form() && check());  else return false;"
	enctype="multipart/form-data" accept-charset="UTF-8" class="niceform">
 
<!-- infos CORPUS -->
<fieldset><legend>Informations générales sur le corpus</legend>
<table>
	<tr>
		<td><label for="Statut_corpus">Statut du corpus</label></td>
 
 
		<td><select size="1" name="Statut_corpus" id="StatutCorpus">
			<!--					<option value="">---Sélectionnez---</option>-->
			<option value="Transcrit">Transcrit</option>
 
 
			<option value="Verifie_Non_Anonymise">Verifié - Non Anonymisé</option>
 
 
			<option value="Verifie_Anonymise">Vérifié - Anonymisé</option>
 
		</select></td>
	</tr>
 
	<tr>
		<td><label for="NomFichierSource">Nom du dossier contenant le corpus
		informatisé (identifiant)</label></td>
 
		<td><input type="text" size="30" name="NomFichierSource"
			id="NomFichierSource" onblur="req_NomFichierSource();"> <span
			id="NomFichierSource_check"></span></td>
	</tr>
 
	<tr>
		<td><label for="Ancien_id">Ancien identifiant/Titre</label></td>
		<td><input type="text" size="30" name="Ancien_id"></td>
	</tr>
</form>
 
</div>
</body>
</html>

niceforms.js

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/*#############################################################
Name: Niceforms
Version: 2.0
Author: Lucian Slatineanu
URL: http://www.emblematiq.com/projects/niceforms/
 
Feel free to use and modify but please keep this copyright intact.
#################################################################*/
 
//Theme Variables - edit these to match your theme
var imagesPath = "img/";
var selectRightWidthSimple = 19;
var selectRightWidthScroll = 2;
var selectMaxHeight = 200;
var textareaTopPadding = 10;
var textareaSidePadding = 10;
 
//Global Variables
var NF = new Array();
var isIE = false;
var resizeTest = 1;
 
//Initialization function
function NFInit() {
	try {
		document.execCommand('BackgroundImageCache', false, true);
	} catch(e) {}
	if(!document.getElementById) {return false;}
	//alert("click me first");
	NFDo('start');
}
function NFDo(what) {
	var niceforms = document.getElementsByTagName('form');
	var identifier = new RegExp('(^| )'+'niceform'+'( |$)');
	if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)) {
		var ieversion=new Number(RegExp.$1);
		if(ieversion < 7) {return false;} //exit script if IE6
		isIE = true;
	}
	for(var q = 0; q < niceforms.length; q++) {if(identifier.test(niceforms[q].className)) {
		if(what == "start") { //Load Niceforms
			NF[q] = new niceform(niceforms[q]);
			niceforms[q].start();
		}
		else { //Unload Niceforms
			niceforms[q].unload();
			NF[q] = "";
		}
	}}
}
function NFFix() {
	NFDo('stop');
	NFDo('start');
}
function niceform(nf) {
	nf._inputText = new Array(); nf._inputRadio = new Array(); nf._inputCheck = new Array(); nf._inputSubmit = new Array(); nf._inputFile = new Array(); nf._textarea = new Array(); nf._select = new Array(); nf._multiselect = new Array();
	nf.add_inputText = function(obj) {this._inputText[this._inputText.length] = obj; inputText(obj);}
	nf.add_inputRadio = function(obj) {this._inputRadio[this._inputRadio.length] = obj; inputRadio(obj);}
	nf.add_inputCheck = function(obj) {this._inputCheck[this._inputCheck.length] = obj; inputCheck(obj);}
	nf.add_inputSubmit = function(obj) {this._inputSubmit[this._inputSubmit.length] = obj; inputSubmit(obj);}
	nf.add_inputFile = function(obj) {this._inputFile[this._inputFile.length] = obj; inputFile(obj);}
	nf.add_textarea = function(obj) {this._textarea[this._textarea.length] = obj; textarea(obj);}
	nf.add_select = function(obj) {this._select[this._select.length] = obj; selects(obj);}
	nf.add_multiselect = function(obj) {this._multiselect[this._multiselect.length] = obj; multiSelects(obj);}
	nf.start = function() {
		//Separate and assign elements
		var allInputs = this.getElementsByTagName('input');
		for(var w = 0; w < allInputs.length; w++) {
			switch(allInputs[w].type) {
				case "text": case "password": {this.add_inputText(allInputs[w]); break;}
				case "radio": {this.add_inputRadio(allInputs[w]); break;}
				case "checkbox": {this.add_inputCheck(allInputs[w]); break;}
				case "submit": case "reset": case "button": {this.add_inputSubmit(allInputs[w]); break;}
				case "file": {this.add_inputFile(allInputs[w]); break;}
			}
		}
		var allButtons = this.getElementsByTagName('button');
		for(var w = 0; w < allButtons.length; w++) {
			this.add_inputSubmit(allButtons[w]);
		}
		var allTextareas = this.getElementsByTagName('textarea');
		for(var w = 0; w < allTextareas.length; w++) {
			this.add_textarea(allTextareas[w]);
		}
		var allSelects = this.getElementsByTagName('select');
		for(var w = 0; w < allSelects.length; w++) {
			if(allSelects[w].size == "1") {this.add_select(allSelects[w]);}
			else {this.add_multiselect(allSelects[w]);}
		}
		//Start
		for(w = 0; w < this._inputText.length; w++) {this._inputText[w].init();}
		for(w = 0; w < this._inputRadio.length; w++) {this._inputRadio[w].init();}
		for(w = 0; w < this._inputCheck.length; w++) {this._inputCheck[w].init();}
		for(w = 0; w < this._inputSubmit.length; w++) {this._inputSubmit[w].init();}
		for(w = 0; w < this._inputFile.length; w++) {this._inputFile[w].init();}
		for(w = 0; w < this._textarea.length; w++) {this._textarea[w].init();}
		for(w = 0; w < this._select.length; w++) {this._select[w].init(w);}
		for(w = 0; w < this._multiselect.length; w++) {this._multiselect[w].init(w);}
	}
	nf.unload = function() {
		//Stop
		for(w = 0; w < this._inputText.length; w++) {this._inputText[w].unload();}
		for(w = 0; w < this._inputRadio.length; w++) {this._inputRadio[w].unload();}
		for(w = 0; w < this._inputCheck.length; w++) {this._inputCheck[w].unload();}
		for(w = 0; w < this._inputSubmit.length; w++) {this._inputSubmit[w].unload();}
		for(w = 0; w < this._inputFile.length; w++) {this._inputFile[w].unload();}
		for(w = 0; w < this._textarea.length; w++) {this._textarea[w].unload();}
		for(w = 0; w < this._select.length; w++) {this._select[w].unload();}
		for(w = 0; w < this._multiselect.length; w++) {this._multiselect[w].unload();}
	}
}
function inputText(el) { //extent Text inputs
	el.oldClassName = el.className;
	el.left = document.createElement('img');
	el.left.src = imagesPath + "0.png";
	el.left.className = "NFTextLeft";
	el.right = document.createElement('img');
	el.right.src = imagesPath + "0.png";
	el.right.className = "NFTextRight";
	el.dummy = document.createElement('div');
	el.dummy.className = "NFTextCenter";
	el.onfocus = function() {
		this.dummy.className = "NFTextCenter NFh";
		this.left.className = "NFTextLeft NFh";
		this.right.className = "NFTextRight NFh";
	}
	el.onblur = function() {
		this.dummy.className = "NFTextCenter";
		this.left.className = "NFTextLeft";
		this.right.className = "NFTextRight";
	}
	el.init = function() {
		this.parentNode.insertBefore(this.left, this);
		this.parentNode.insertBefore(this.right, this.nextSibling);
		this.dummy.appendChild(this);
		this.right.parentNode.insertBefore(this.dummy, this.right);
		this.className = "NFText";
	}
	el.unload = function() {
		this.parentNode.parentNode.appendChild(this);
		this.parentNode.removeChild(this.left);
		this.parentNode.removeChild(this.right);
		this.parentNode.removeChild(this.dummy);
		this.className = this.oldClassName;
	}
}
function inputRadio(el) { //extent Radio buttons
	el.oldClassName = el.className;
	el.dummy = document.createElement('div');
	if(el.checked) {el.dummy.className = "NFRadio NFh";}
	else {el.dummy.className = "NFRadio";}
	el.dummy.ref = el;
	if(isIE == false) {el.dummy.style.left = findPosX(el) + 'px'; el.dummy.style.top = findPosY(el) + 'px';}
	else {el.dummy.style.left = findPosX(el) + 4 + 'px'; el.dummy.style.top = findPosY(el) + 4 + 'px';}
	el.dummy.onclick = function() {
		if(!this.ref.checked) {
			var siblings = getInputsByName(this.ref.name);
			for(var q = 0; q < siblings.length; q++) {
				siblings[q].checked = false;
				siblings[q].dummy.className = "NFRadio";
			}
			this.ref.checked = true;
			this.className = "NFRadio NFh";
		}
	}
	el.onclick = function() {
		if(this.checked) {
			var siblings = getInputsByName(this.name);
			for(var q = 0; q < siblings.length; q++) {
				siblings[q].dummy.className = "NFRadio";
			}
			this.dummy.className = "NFRadio NFh";
		}
	}
	el.onfocus = function() {this.dummy.className += " NFfocused";}
	el.onblur = function() {this.dummy.className = this.dummy.className.replace(/ NFfocused/g, "");}
	el.init = function() {
		this.parentNode.insertBefore(this.dummy, this);
		el.className = "NFhidden";
	}
	el.unload = function() {
		this.parentNode.removeChild(this.dummy);
		this.className = this.oldClassName;
	}
}
function inputCheck(el) { //extend Checkboxes
	el.oldClassName = el.className;
	el.dummy = document.createElement('img');
	el.dummy.src = imagesPath + "0.png";
	if(el.checked) {el.dummy.className = "NFCheck NFh";}
	else {el.dummy.className = "NFCheck";}
	el.dummy.ref = el;
	if(isIE == false) {el.dummy.style.left = findPosX(el) + 'px'; el.dummy.style.top = findPosY(el) + 'px';}
	else {el.dummy.style.left = findPosX(el) + 4 + 'px'; el.dummy.style.top = findPosY(el) + 4 + 'px';}
	el.dummy.onclick = function() {
		if(!this.ref.checked) {
			this.ref.checked = true;
			this.className = "NFCheck NFh";
		}
		else {
			this.ref.checked = false;
			this.className = "NFCheck";
		}
	}
	el.onclick = function() {
		if(this.checked) {this.dummy.className = "NFCheck NFh";}
		else {this.dummy.className = "NFCheck";}
	}
	el.onfocus = function() {this.dummy.className += " NFfocused";}
	el.onblur = function() {this.dummy.className = this.dummy.className.replace(/ NFfocused/g, "");}
	el.init = function() {
		this.parentNode.insertBefore(this.dummy, this);
		el.className = "NFhidden";
	} 
	el.unload = function() {
		this.parentNode.removeChild(this.dummy);
		this.className = this.oldClassName;
	}
}
function inputSubmit(el) { //extend Buttons
	el.oldClassName = el.className;
	el.left = document.createElement('img');
	el.left.className = "NFButtonLeft";
	el.left.src = imagesPath + "0.png";
	el.right = document.createElement('img');
	el.right.src = imagesPath + "0.png";
	el.right.className = "NFButtonRight";
	el.onmouseover = function() {
		this.className = "NFButton NFh";
		this.left.className = "NFButtonLeft NFh";
		this.right.className = "NFButtonRight NFh";
	}
	el.onmouseout = function() {
		this.className = "NFButton";
		this.left.className = "NFButtonLeft";
		this.right.className = "NFButtonRight";
	}
	el.init = function() {
		this.parentNode.insertBefore(this.left, this);
		this.parentNode.insertBefore(this.right, this.nextSibling);
		this.className = "NFButton";
	}
	el.unload = function() {
		this.parentNode.removeChild(this.left);
		this.parentNode.removeChild(this.right);
		this.className = this.oldClassName;
	}
}
function inputFile(el) { //extend File inputs
	el.oldClassName = el.className;
	el.dummy = document.createElement('div');
	el.dummy.className = "NFFile";
	el.file = document.createElement('div');
	el.file.className = "NFFileNew";
	el.center = document.createElement('div');
	el.center.className = "NFTextCenter";
	el.clone = document.createElement('input');
	el.clone.type = "text";
	el.clone.className = "NFText";
	el.clone.ref = el;
	el.left = document.createElement('img');
	el.left.src = imagesPath + "0.png";
	el.left.className = "NFTextLeft";
	el.button = document.createElement('img');
	el.button.src = imagesPath + "0.png";
	el.button.className = "NFFileButton";
	el.button.ref = el;
	el.button.onclick = function() {this.ref.click();}
	el.init = function() {
		var top = this.parentNode;
		if(this.previousSibling) {var where = this.previousSibling;}
		else {var where = top.childNodes[0];}
		top.insertBefore(this.dummy, where);
		this.dummy.appendChild(this);
		this.center.appendChild(this.clone);
		this.file.appendChild(this.center);
		this.file.insertBefore(this.left, this.center);
		this.file.appendChild(this.button);
		this.dummy.appendChild(this.file);
		this.className = "NFhidden";
		this.relatedElement = this.clone;
	}
	el.unload = function() {
		this.parentNode.parentNode.appendChild(this);
		this.parentNode.removeChild(this.dummy);
		this.className = this.oldClassName;
	}
	el.onchange = el.onmouseout = function() {this.relatedElement.value = this.value;}
	el.onfocus = function() {
		this.left.className = "NFTextLeft NFh";
		this.center.className = "NFTextCenter NFh";
		this.button.className = "NFFileButton NFh";
	}
	el.onblur = function() {
		this.left.className = "NFTextLeft";
		this.center.className = "NFTextCenter";
		this.button.className = "NFFileButton";
	}
	el.onselect = function() {
		this.relatedElement.select();
		this.value = '';
	}
}
function textarea(el) { //extend Textareas
	el.oldClassName = el.className;
	el.height = el.offsetHeight - textareaTopPadding;
	el.width = el.offsetWidth - textareaSidePadding;
	el.topLeft = document.createElement('img');
	el.topLeft.src = imagesPath + "0.png";
	el.topLeft.className = "NFTextareaTopLeft";
	el.topRight = document.createElement('div');
	el.topRight.className = "NFTextareaTop";
	el.bottomLeft = document.createElement('img');
	el.bottomLeft.src = imagesPath + "0.png";
	el.bottomLeft.className = "NFTextareaBottomLeft";
	el.bottomRight = document.createElement('div');
	el.bottomRight.className = "NFTextareaBottom";
	el.left = document.createElement('div');
	el.left.className = "NFTextareaLeft";
	el.right = document.createElement('div');
	el.right.className = "NFTextareaRight";
	el.init = function() {
		var top = this.parentNode;
		if(this.previousSibling) {var where = this.previousSibling;}
		else {var where = top.childNodes[0];}
		top.insertBefore(el.topRight, where);
		top.insertBefore(el.right, where);
		top.insertBefore(el.bottomRight, where);
		this.topRight.appendChild(this.topLeft);
		this.right.appendChild(this.left);
		this.right.appendChild(this);
		this.bottomRight.appendChild(this.bottomLeft);
		el.style.width = el.topRight.style.width = el.bottomRight.style.width = el.width + 'px';
		el.style.height = el.left.style.height = el.right.style.height = el.height + 'px';
		this.className = "NFTextarea";
	}
	el.unload = function() {
		this.parentNode.parentNode.appendChild(this);
		this.parentNode.removeChild(this.topRight);
		this.parentNode.removeChild(this.bottomRight);
		this.parentNode.removeChild(this.right);
		this.className = this.oldClassName;
		this.style.width = this.style.height = "";
	}
	el.onfocus = function() {
		this.topLeft.className = "NFTextareaTopLeft NFh";
		this.topRight.className = "NFTextareaTop NFhr";
		this.left.className = "NFTextareaLeftH";
		this.right.className = "NFTextareaRightH";
		this.bottomLeft.className = "NFTextareaBottomLeft NFh";
		this.bottomRight.className = "NFTextareaBottom NFhr";
	}
	el.onblur = function() {
		this.topLeft.className = "NFTextareaTopLeft";
		this.topRight.className = "NFTextareaTop";
		this.left.className = "NFTextareaLeft";
		this.right.className = "NFTextareaRight";
		this.bottomLeft.className = "NFTextareaBottomLeft";
		this.bottomRight.className = "NFTextareaBottom";
	}
}
function selects(el) { //extend Selects
	el.oldClassName = el.className;
	el.dummy = document.createElement('div');
	el.dummy.className = "NFSelect";
	el.dummy.style.width = el.offsetWidth + 'px';
	el.dummy.ref = el;
	el.left = document.createElement('img');
	el.left.src = imagesPath + "0.png";
	el.left.className = "NFSelectLeft";
	el.right = document.createElement('div');
	el.right.className = "NFSelectRight";
	el.txt = document.createTextNode(el.options[0].text);
	el.bg = document.createElement('div');
	el.bg.className = "NFSelectTarget";
	el.bg.style.display = "none";
	el.opt = document.createElement('ul');
	el.opt.className = "NFSelectOptions";
	el.dummy.style.left = findPosX(el) + 'px';
	el.dummy.style.top = findPosY(el) + 'px';
	el.opts = new Array(el.options.length);
	el.init = function(pos) {
		this.dummy.appendChild(this.left);
		this.right.appendChild(this.txt);
		this.dummy.appendChild(this.right);
		this.bg.appendChild(this.opt);
		this.dummy.appendChild(this.bg);
		for(var q = 0; q < this.options.length; q++) {
			this.opts[q] = new option(this.options[q], q);
			this.opt.appendChild(this.options[q].li);
			this.options[q].lnk.onclick = function() {
				this._onclick();
				this.ref.dummy.getElementsByTagName('div')[0].innerHTML = this.ref.options[this.pos].text;
				this.ref.options[this.pos].selected = "selected";
				for(var w = 0; w < this.ref.options.length; w++) {this.ref.options[w].lnk.className = "";}
				this.ref.options[this.pos].lnk.className = "NFOptionActive";
			}
		}
		if(this.options.selectedIndex) {
			this.dummy.getElementsByTagName('div')[0].innerHTML = this.options[this.options.selectedIndex].text;
			this.options[this.options.selectedIndex].lnk.className = "NFOptionActive";
		}
		this.dummy.style.zIndex = 999 - pos;
		this.parentNode.insertBefore(this.dummy, this);
		this.className = "NFhidden";
	}
	el.unload = function() {
		this.parentNode.removeChild(this.dummy);
		this.className = this.oldClassName;
	}
	el.dummy.onclick = function() {
		var allDivs = document.getElementsByTagName('div'); for(var q = 0; q < allDivs.length; q++) {if((allDivs[q].className == "NFSelectTarget") && (allDivs[q] != this.ref.bg)) {allDivs[q].style.display = "none";}}
		if(this.ref.bg.style.display == "none") {this.ref.bg.style.display = "block";}
		else {this.ref.bg.style.display = "none";}
		if(this.ref.opt.offsetHeight > selectMaxHeight) {
			this.ref.bg.style.width = this.ref.offsetWidth - selectRightWidthScroll + 33 + 'px';
			this.ref.opt.style.width = this.ref.offsetWidth - selectRightWidthScroll + 'px';
		}
		else {
			this.ref.bg.style.width = this.ref.offsetWidth - selectRightWidthSimple + 33 + 'px';
			this.ref.opt.style.width = this.ref.offsetWidth - selectRightWidthSimple + 'px';
		}
	}
	el.bg.onmouseout = function(e) {
		if (!e) var e = window.event;
		e.cancelBubble = true;
		if (e.stopPropagation) e.stopPropagation();
		var reltg = (e.relatedTarget) ? e.relatedTarget : e.toElement;
		if((reltg.nodeName == 'A') || (reltg.nodeName == 'LI') || (reltg.nodeName == 'UL')) return;
		if((reltg.nodeName == 'DIV') || (reltg.className == 'NFSelectTarget')) return;
		else{this.style.display = "none";}
	}
	el.dummy.onmouseout = function(e) {
		if (!e) var e = window.event;
		e.cancelBubble = true;
		if (e.stopPropagation) e.stopPropagation();
		var reltg = (e.relatedTarget) ? e.relatedTarget : e.toElement;
		if((reltg.nodeName == 'A') || (reltg.nodeName == 'LI') || (reltg.nodeName == 'UL')) return;
		if((reltg.nodeName == 'DIV') || (reltg.className == 'NFSelectTarget')) return;
		else{this.ref.bg.style.display = "none";}
	}
	el.onfocus = function() {this.dummy.className += " NFfocused";}
	el.onblur = function() {this.dummy.className = this.dummy.className.replace(/ NFfocused/g, "");}
	el.onkeydown = function(e) {
		if (!e) var e = window.event;
		var thecode = e.keyCode;
		var active = this.selectedIndex;
		switch(thecode){
			case 40: //down
				if(active < this.options.length - 1) {
					for(var w = 0; w < this.options.length; w++) {this.options[w].lnk.className = "";}
					var newOne = active + 1;
					this.options[newOne].selected = "selected";
					this.options[newOne].lnk.className = "NFOptionActive";
					this.dummy.getElementsByTagName('div')[0].innerHTML = this.options[newOne].text;
				}
				return false;
				break;
			case 38: //up
				if(active > 0) {
					for(var w = 0; w < this.options.length; w++) {this.options[w].lnk.className = "";}
					var newOne = active - 1;
					this.options[newOne].selected = "selected";
					this.options[newOne].lnk.className = "NFOptionActive";
					this.dummy.getElementsByTagName('div')[0].innerHTML = this.options[newOne].text;
				}
				return false;
				break;
			default:
				break;
		}
	}
}
function multiSelects(el) { //extend Multiple Selects
	el.oldClassName = el.className;
	el.height = el.offsetHeight;
	el.width = el.offsetWidth;
	el.topLeft = document.createElement('img');
	el.topLeft.src = imagesPath + "0.png";
	el.topLeft.className = "NFMultiSelectTopLeft";
	el.topRight = document.createElement('div');
	el.topRight.className = "NFMultiSelectTop";
	el.bottomLeft = document.createElement('img');
	el.bottomLeft.src = imagesPath + "0.png";
	el.bottomLeft.className = "NFMultiSelectBottomLeft";
	el.bottomRight = document.createElement('div');
	el.bottomRight.className = "NFMultiSelectBottom";
	el.left = document.createElement('div');
	el.left.className = "NFMultiSelectLeft";
	el.right = document.createElement('div');
	el.right.className = "NFMultiSelectRight";
	el.init = function() {
		var top = this.parentNode;
		if(this.previousSibling) {var where = this.previousSibling;}
		else {var where = top.childNodes[0];}
		top.insertBefore(el.topRight, where);
		top.insertBefore(el.right, where);
		top.insertBefore(el.bottomRight, where);
		this.topRight.appendChild(this.topLeft);
		this.right.appendChild(this.left);
		this.right.appendChild(this);
		this.bottomRight.appendChild(this.bottomLeft);
		el.style.width = el.topRight.style.width = el.bottomRight.style.width = el.width + 'px';
		el.style.height = el.left.style.height = el.right.style.height = el.height + 'px';
		el.className = "NFMultiSelect";
	}
	el.unload = function() {
		this.parentNode.parentNode.appendChild(this);
		this.parentNode.removeChild(this.topRight);
		this.parentNode.removeChild(this.bottomRight);
		this.parentNode.removeChild(this.right);
		this.className = this.oldClassName;
		this.style.width = this.style.height = "";
	}
	el.onfocus = function() {
		this.topLeft.className = "NFMultiSelectTopLeft NFh";
		this.topRight.className = "NFMultiSelectTop NFhr";
		this.left.className = "NFMultiSelectLeftH";
		this.right.className = "NFMultiSelectRightH";
		this.bottomLeft.className = "NFMultiSelectBottomLeft NFh";
		this.bottomRight.className = "NFMultiSelectBottom NFhr";
	}
	el.onblur = function() {
		this.topLeft.className = "NFMultiSelectTopLeft";
		this.topRight.className = "NFMultiSelectTop";
		this.left.className = "NFMultiSelectLeft";
		this.right.className = "NFMultiSelectRight";
		this.bottomLeft.className = "NFMultiSelectBottomLeft";
		this.bottomRight.className = "NFMultiSelectBottom";
	}
}
function option(el, no) { //extend Options
	el.li = document.createElement('li');
	el.lnk = document.createElement('a');
	el.lnk.href = "javascript:;";
	el.lnk.ref = el.parentNode;
	el.lnk.pos = no;
	el.lnk._onclick = el.onclick || function () {};
	el.txt = document.createTextNode(el.text);
	el.lnk.appendChild(el.txt);
	el.li.appendChild(el.lnk);
}
 
//Get Position
function findPosY(obj) {
	var posTop = 0;
	do {posTop += obj.offsetTop;} while (obj = obj.offsetParent);
	return posTop;
}
function findPosX(obj) {
	var posLeft = 0;
	do {posLeft += obj.offsetLeft;} while (obj = obj.offsetParent);
	return posLeft;
}
//Get Siblings
function getInputsByName(name) {
	var inputs = document.getElementsByTagName("input");
	var w = 0; var results = new Array();
	for(var q = 0; q < inputs.length; q++) {if(inputs[q].name == name) {results[w] = inputs[q]; ++w;}}
	return results;
}
 
//Add events
var existingLoadEvent = window.onload || function () {};
var existingResizeEvent = window.onresize || function() {};
window.onload = function () {
    existingLoadEvent();
    NFInit();
}
window.onresize = function() {
	if(resizeTest != document.documentElement.clientHeight) {
		existingResizeEvent();
		NFFix();
	}
	resizeTest = document.documentElement.clientHeight;
}

niceforms-default.css

Code:

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/*Defaults Styling*/
body {font:12px/17px Arial, Helvetica, sans-serif; color:#333; background:#ccc; padding:40px 20px 20px 20px;}
fieldset {background:#f2f2e6; padding:10px; border:1px solid #fff; border-color:#fff #666661 #666661 #fff; margin-bottom:36px; width:600px;}
input, textarea, select {font:12px/12px Arial, Helvetica, sans-serif; padding:1.5; line-height:25px;}
fieldset.action {background:#9da2a6; border-color:#e5e5e5 #797c80 #797c80 #e5e5e5; margin-top:-20px;}
legend {background:#bfbf30; color:#fff; font:17px/21px Calibri, Arial, Helvetica, sans-serif; padding:0 10px; margin:-26px 0 0 -11px; font-weight:bold; border:1px solid #fff; border-color:#e5e5c3 #505014 #505014 #e5e5c3;}
label {font-size:13px; font-weight:bold; color:#666;}
label.opt {font-weight:normal;}
dl {clear:both;}
dt {float:left; text-align:right; width:90px; line-height:25px; margin:0 10px 10px 0;}
dd {float:left; width:475px; line-height:25px; margin:0 0 10px 0;}
#footer {font-size:11px;}
/*td{float:left;  width:275px; line-height:25px; margin:0 10px 10px 0;}*/
td {border: 1px solid #ccc;
  padding: 0.2em;
  font-size: 90%;
 
  }
  table {
 
  border: 1px solid #ccc;
  border-collapse: collapse;
  border-spacing: 0;
 
  margin: 1em 0em 1em 0em;
}
#container {width:700px; margin:0 auto;}
 
 
/*##########################################
Script: Niceforms 2.0
Theme: StandardBlue
Author: Lucian Slatineanu
URL: http://www.emblematiq.com/
##########################################*/
 
/*Text inputs*/
.NFText {border:none; vertical-align:middle; font:12px/15px Arial, Helvetica, sans-serif; background:none;}
.NFTextCenter {height:15px; background:url(img/input.png) repeat-x 0 0; padding:3px 0; margin:0; float:left; line-height:15px;}
.NFTextLeft, .NFTextRight {width:7px; height:21px; vertical-align:middle; float:left;}
.NFTextLeft {background:url(img/input-left.png) no-repeat 0 0;}
.NFTextRight {background:url(img/input-right.png) no-repeat 0 0;}
/*Radio*/
.NFRadio {cursor:pointer; position:absolute; display:block; width:13px; height:13px; border:1px solid transparent; background:url(img/radio.png) no-repeat 0 0; z-index:2;}
/*Checkbox*/
.NFCheck {cursor:pointer; position:absolute; width:12px; height:12px; border:1px solid transparent; background:url(img/checkbox.png) no-repeat 0 0; z-index:2;}
/*Buttons*/
.NFButton {width:auto; height:26px; color:#fff; padding:0 2px; background:url(img/button.png) repeat-x 0 0; cursor:pointer; border:none; font:10px/26px Tahoma, Arial, Helvetica, sans-serif; font-weight:bold; text-transform:uppercase; letter-spacing:1px; vertical-align:middle;}
.NFButtonLeft, .NFButtonRight {width:6px; height:26px; vertical-align:middle;}
.NFButtonLeft {background:url(img/button-left.png) no-repeat 0 0;}
.NFButtonRight {background:url(img/button-right.png) no-repeat 0 0;}
/*Textareas*/
.NFTextarea {border:none; background:none; font:12px/12px Arial, Helvetica, sans-serif; margin:0;}
.NFTextareaTop, .NFTextareaBottom {height:5px; clear:both; float:none; padding-right:10px;}
.NFTextareaTop {background:url(img/textarea-tr.png) no-repeat 100% 0;}
.NFTextareaBottom {background:url(img/textarea-br.png) no-repeat 100% 0; margin-bottom:5px;}
.NFTextareaTopLeft, .NFTextareaBottomLeft {width:5px; height:5px;}
.NFTextareaTopLeft {background:#f2f2e6 url(img/textarea-tl.png) no-repeat 0 0;}
.NFTextareaBottomLeft {background:#f2f2e6 url(img/textarea-bl.png) no-repeat 0 0;}
.NFTextareaLeft, .NFTextareaRight, .NFTextareaLeftH, .NFTextareaRightH {float:left; padding-bottom:5px;}
.NFTextareaLeft, .NFTextareaLeftH {width:5px;}
.NFTextareaLeft {background:url(img/textarea-l-off.png) repeat-y 0 0;}
.NFTextareaLeftH {background:url(img/textarea-l-over.png) repeat-y 0 0;}
.NFTextareaRight, .NFTextareaRightH {padding-right:5px; padding-bottom:0;}
.NFTextareaRight {background:url(img/textarea-r-off.png) repeat-y 100% 0;}
.NFTextareaRightH {background:url(img/textarea-r-over.png) repeat-y 100% 100%;}
/*Files*/
.NFFileButton {padding-bottom:0; vertical-align:bottom; cursor:pointer; background:url(img/file.png) no-repeat 0 0; width:60px; height:21px;}
.NFFile {position:relative; margin-bottom:5px;}
.NFFile input.NFhidden {position:relative; filter:alpha(opacity=0); opacity:0; z-index:2; cursor:pointer; text-align:left;}
.NFFileNew {position:absolute; top:0px; left:0px; z-index:1;}
/*Selects*/
.NFSelect {height:21px; position:absolute; border:1px solid transparent;}
.NFSelectLeft {float:left; width:3px; height:21px; background:url(img/select-left.png) no-repeat 0 0; vertical-align:middle;}
.NFSelectRight {height:21px; width:auto; background:url(img/select-right.png) no-repeat 100% 0; cursor:pointer; font:12px/21px Arial, Helvetica, sans-serif; color:#fff; padding-left:3px; margin-left:3px;}
.NFSelectTarget {position:absolute; background:none; margin-left:-13px; margin-top:18px; z-index:3; left:0; top:0; padding-bottom:13px;}
.NFSelectOptions {position:relative; background:#707175; margin-left:16px; margin-top:0; list-style:none; padding:4px 0; color:#fff; font:11px/13px Arial, Helvetica, sans-serif; z-index:4; max-height:200px; overflow-y:auto; overflow-x:hidden; left:0; top:0;}
.NFSelectOptions li {padding-bottom:1px;}
.NFSelectOptions a {display:block; text-decoration:none; color:#fff; padding:2px 3px; background:none;}
.NFSelectOptions a.NFOptionActive {background:#464646;}
.NFSelectOptions a:hover {background:#333;}
/*Multiple Selects*/
.NFMultiSelect {border:0; background:none; margin:0;}
.NFMultiSelectTop, .NFMultiSelectBottom {height:5px; clear:both; float:none; padding-right:10px;}
.NFMultiSelectTop {background:url(img/textarea-tr.png) no-repeat 100% 0;}
.NFMultiSelectBottom {background:url(img/textarea-br.png) no-repeat 100% 0; margin-bottom:5px;}
.NFMultiSelectTopLeft, .NFMultiSelectBottomLeft {width:5px; height:5px;}
.NFMultiSelectTopLeft {background:#f2f2e6 url(img/textarea-tl.png) no-repeat 0 0;}
.NFMultiSelectBottomLeft {background:#f2f2e6 url(img/textarea-bl.png) no-repeat 0 0;}
.NFMultiSelectLeft, .NFMultiSelectRight, .NFMultiSelectLeftH, .NFMultiSelectRightH {float:left; padding-bottom:5px;}
.NFMultiSelectLeft, .NFMultiSelectLeftH {width:5px;}
.NFMultiSelectLeft {background:url(img/textarea-l-off.png) repeat-y 0 0;}
.NFMultiSelectLeftH {background:url(img/textarea-l-over.png) repeat-y 0 0;}
.NFMultiSelectRight, .NFMultiSelectRightH {padding-right:5px; padding-bottom:0;}
.NFMultiSelectRight {background:url(img/textarea-r-off.png) repeat-y 100% 0;}
.NFMultiSelectRightH {background:url(img/textarea-r-over.png) repeat-y 100% 0;}
 
/*Focused*/
.NFfocused {border:1px dotted #666;}
/*Hovered*/
.NFh {background-position:0 100%;}
.NFhr {background-position:100% 100%;}
/*Hidden*/
.NFhidden {opacity:0; z-index:-1; position:relative;}
/*Safari*/
select, input, textarea, button {outline:none; resize:none;}

alors j'ai trouvé ce code sur ce site http://www.emblematiq.com/lab/niceforms/demo/ et je l'ai adapté un peu.

j'ai bien respecter les chemins mais le js ne fonctionne pas je ne sais pas pourquoi

merci de votre aide