bonjour a tous,
Cela fait 48h que je me creuse la tête pour modifier l'affichage d'une menu.
En effet, celui ci est deroulant et s'ouvre en dessous du bouton (li)
Hors je souhaiterais qu'il s'ouvre sur toute la largeur du site.
Pour la largeur pas de soucis,
Mon probleme est de le faire demarrer depuis la gauche complete du site et non a partir du <li> du texte menu

Voici le code js si quelqu'un trouve la solution, car la je n'y arrive vraiment pas
Un petit dessin pour me comprendre, le menu du haut actuel et celui en dessous se que je souhaite faire.
Donc le menu deroulant demarre completement a gauche.



Code : Sélectionner tout - Visualiser dans une fenêtre à part
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//** All Levels Navigational Menu- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Script Download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/ddlevelsmenu/
//** Usage Terms: http://www.dynamicdrive.com/notice.htm
 
//** Current version: 3.0 See changelog.txt for details
 
if (typeof dd_domreadycheck=="undefined") //global variable to detect if DOM is ready
	var dd_domreadycheck=false
 
var ddlevelsmenu={
enableshim: true, //enable IFRAME shim to prevent drop down menus from being hidden below SELECT or FLASH elements? (tip: disable if not in use, for efficiency)
 
arrowpointers:{
	downarrow: ["/css/menu/mimp.png", 11,7], //[path_to_down_arrow, arrowwidth, arrowheight]
	rightarrow: ["/css/menu/mimp.png", 12,12], //[path_to_right_arrow, arrowwidth, arrowheight]
	showarrow: {toplevel: true, sublevel: true} //Show arrow images on top level items and sub level items, respectively?
},
hideinterval: 200, //delay in milliseconds before entire menu disappears onmouseout.
effects: {enableswipe: true, enableslide: true, enablefade: true, duration: 200},
httpsiframesrc: "blank.htm", //If menu is run on a secure (https) page, the IFRAME shim feature used by the script should point to an *blank* page *within* the secure area to prevent an IE security prompt. Specify full URL to that page on your server (leave as is if not applicable).
 
///No need to edit beyond here////////////////////
 
topmenuids: [], //array containing ids of all the primary menus on the page
topitems: {}, //object array containing all top menu item links
subuls: {}, //object array containing all ULs
lastactivesubul: {}, //object object containing info for last mouse out menu item's UL
topitemsindex: -1,
ulindex: -1,
hidetimers: {}, //object array timer
shimadded: false,
nonFF: !/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent), //detect non FF browsers
getoffset:function(what, offsettype){
	return (what.offsetParent)? what[offsettype]+this.getoffset(what.offsetParent, offsettype) : what[offsettype]
},
 
getoffsetof:function(el){
	el._offsets={left:this.getoffset(el, "offsetLeft"), top:this.getoffset(el, "offsetTop")}
},
 
getwindowsize:function(){
	this.docwidth=window.innerWidth? window.innerWidth-10 : this.standardbody.clientWidth-10
	this.docheight=window.innerHeight? window.innerHeight-15 : this.standardbody.clientHeight-18
},
 
gettopitemsdimensions:function(){
	for (var m=0; m<this.topmenuids.length; m++){
		var topmenuid=this.topmenuids[m]
		for (var i=0; i<this.topitems[topmenuid].length; i++){
			var header=this.topitems[topmenuid][i]
			var submenu=document.getElementById(header.getAttribute('rel'))
			header._dimensions={w:header.offsetWidth, h:header.offsetHeight, submenuw:submenu.offsetWidth, submenuh:submenu.offsetHeight}
		}
	}
},
 
isContained:function(m, e){
	var e=window.event || e
	var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement)
	while (c && c!=m)try {c=c.parentNode} catch(e){c=m}
	if (c==m)
		return true
	else
		return false
},
 
addpointer:function(target, imgclass, imginfo, BeforeorAfter){
	var pointer=document.createElement("img")
	pointer.src=imginfo[0]
	pointer.style.width=imginfo[1]+"px"
	pointer.style.height=imginfo[2]+"px"
	if(imgclass=="rightarrowpointer"){
		pointer.style.left=target.offsetWidth-imginfo[2]-2+"px"
	}
	pointer.className=imgclass
	var target_firstEl=target.childNodes[target.firstChild.nodeType!=1? 1 : 0] //see if the first child element within A is a SPAN (found in sliding doors technique)
	if (target_firstEl && target_firstEl.tagName=="SPAN"){
		target=target_firstEl //arrow should be added inside this SPAN instead if found
	}
	if (BeforeorAfter=="before")
		target.insertBefore(pointer, target.firstChild)
	else
		target.appendChild(pointer)
},
 
css:function(el, targetclass, action){
	var needle=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "ig")
	if (action=="check")
		return needle.test(el.className)
	else if (action=="remove")
		el.className=el.className.replace(needle, "")
	else if (action=="add" && !needle.test(el.className))
		el.className+=" "+targetclass
},
 
addshimmy:function(target){
	var shim=(!window.opera)? document.createElement("iframe") : document.createElement("div") //Opera 9.24 doesnt seem to support transparent IFRAMEs
	shim.className="ddiframeshim"
	shim.setAttribute("src", location.protocol=="https:"? this.httpsiframesrc : "about:blank")
	shim.setAttribute("frameborder", "0")
	target.appendChild(shim)
	try{
		shim.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)'
	}
	catch(e){}
	return shim
},
 
positionshim:function(header, submenu, dir, scrollX, scrollY){
	if (header._istoplevel){
		var scrollY=window.pageYOffset? window.pageYOffset : this.standardbody.scrollTop
		var topgap=header._offsets.top-scrollY
		var bottomgap=scrollY+this.docheight-header._offsets.top-header._dimensions.h
		if (topgap>0){
			this.shimmy.topshim.style.left=scrollX+"px"
			this.shimmy.topshim.style.top=scrollY+"px"
			this.shimmy.topshim.style.width="99%"
			this.shimmy.topshim.style.height=topgap+"px" //distance from top window edge to top of menu item
		}
		if (bottomgap>0){
			this.shimmy.bottomshim.style.left=scrollX+"px"
			this.shimmy.bottomshim.style.top=header._offsets.top + header._dimensions.h +"px"
			this.shimmy.bottomshim.style.width="99%"
			this.shimmy.bottomshim.style.height=bottomgap+"px" //distance from bottom of menu item to bottom window edge
		}
	}
},
 
hideshim:function(){
	this.shimmy.topshim.style.width=this.shimmy.bottomshim.style.width=0
	this.shimmy.topshim.style.height=this.shimmy.bottomshim.style.height=0
},
 
 
buildmenu:function(mainmenuid, header, submenu, submenupos, istoplevel, dir){
	header._master=mainmenuid //Indicate which top menu this header is associated with
	header._pos=submenupos //Indicate pos of sub menu this header is associated with
	header._istoplevel=istoplevel
	if (istoplevel){
		this.addEvent(header, function(e){
		ddlevelsmenu.hidemenu(ddlevelsmenu.subuls[this._master][parseInt(this._pos)])
		}, "click")
	}
	this.subuls[mainmenuid][submenupos]=submenu
	header._dimensions={w:header.offsetWidth, h:header.offsetHeight, submenuw:submenu.offsetWidth, submenuh:submenu.offsetHeight}
	this.getoffsetof(header)
	submenu.parentNode.style.left=0
	submenu.parentNode.style.top=0
	submenu.parentNode.style.visibility="hidden"
	submenu.style.visibility="hidden"
	this.addEvent(header, function(e){ //mouseover event
		if (!ddlevelsmenu.isContained(this, e)){
			var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
			if (this._istoplevel){
				ddlevelsmenu.css(this, "selected", "add")
			clearTimeout(ddlevelsmenu.hidetimers[this._master][this._pos])
			}
			ddlevelsmenu.getoffsetof(header)
			var scrollX=window.pageXOffset? window.pageXOffset : ddlevelsmenu.standardbody.scrollLeft
			var scrollY=window.pageYOffset? window.pageYOffset : ddlevelsmenu.standardbody.scrollTop
			var submenurightedge=this._offsets.left + this._dimensions.submenuw + (this._istoplevel && dir=="topbar"? 0 : this._dimensions.w)
			var submenubottomedge=this._offsets.top + this._dimensions.submenuh
			//Sub menu starting left position
			var menuleft=(this._istoplevel? this._offsets.left + (dir=="sidebar"? this._dimensions.w : 0) : this._dimensions.w)
			if (submenurightedge-scrollX>ddlevelsmenu.docwidth){
				menuleft+= -this._dimensions.submenuw + (this._istoplevel && dir=="topbar" ? this._dimensions.w : -this._dimensions.w)
			}
			submenu.parentNode.style.left=menuleft+"px"
			//Sub menu starting top position
			var menutop=(this._istoplevel? this._offsets.top + (dir=="sidebar"? 0 : this._dimensions.h) : this.offsetTop)
			if (submenubottomedge-scrollY>ddlevelsmenu.docheight){ //no room downwards?
				if (this._dimensions.submenuh<this._offsets.top+(dir=="sidebar"? this._dimensions.h : 0)-scrollY){ //move up?
					menutop+= - this._dimensions.submenuh + (this._istoplevel && dir=="topbar"? -this._dimensions.h : this._dimensions.h)
				}
				else{ //top of window edge
					menutop+= -(this._offsets.top-scrollY) + (this._istoplevel && dir=="topbar"? -this._dimensions.h : 0)
				}
			}
			submenu.parentNode.style.top=menutop+"px"
			if (ddlevelsmenu.enableshim && (ddlevelsmenu.effects.enableswipe==false || ddlevelsmenu.nonFF)){ //apply shim immediately only if animation is turned off, or if on, in non FF2.x browsers
				ddlevelsmenu.positionshim(header, submenu, dir, scrollX, scrollY)
			}
			else{
				submenu.FFscrollInfo={x:scrollX, y:scrollY}
			}
			ddlevelsmenu.showmenu(header, submenu, dir)
		}
	}, "mouseover")
	this.addEvent(header, function(e){ //mouseout event
		var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
		if (this._istoplevel){
			if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(submenu.parentNode, e)) //hide drop down div if mouse moves out of menu bar item but not into drop down div itself
				ddlevelsmenu.hidemenu(submenu.parentNode)
		}
		else if (!this._istoplevel && !ddlevelsmenu.isContained(this, e)){
			ddlevelsmenu.hidemenu(submenu.parentNode)
		}
 
	}, "mouseout")
},
 
setopacity:function(el, value){
	el.style.opacity=value
	if (typeof el.style.opacity!="string"){ //if it's not a string (ie: number instead), it means property not supported
		el.style.MozOpacity=value
		try{
			if (el.filters){
				el.style.filter="progid:DXImageTransform.Microsoft.alpha(opacity="+ value*100 +")"
			}
		} catch(e){}
	}
},
 
showmenu:function(header, submenu, dir){
	if (this.effects.enableswipe || this.effects.enablefade){
		if (this.effects.enableswipe){
			var endpoint=(header._istoplevel && dir=="topbar")? header._dimensions.submenuh : header._dimensions.submenuw
			submenu.parentNode.style.width=submenu.parentNode.style.height=0
			submenu.parentNode.style.overflow="hidden"
		}
		if (this.effects.enablefade){
			submenu.parentNode.style.width=submenu.offsetWidth+"px"
			submenu.parentNode.style.height=submenu.offsetHeight+"px"
			this.setopacity(submenu.parentNode, 0) //set opacity to 0 so menu appears hidden initially
		}
		submenu._curanimatedegree=0
		submenu.parentNode.style.visibility="visible"
		submenu.style.visibility="visible"
		clearInterval(submenu._animatetimer)
		submenu._starttime=new Date().getTime() //get time just before animation is run
		submenu._animatetimer=setInterval(function(){ddlevelsmenu.revealmenu(header, submenu, endpoint, dir)}, 10)
	}
	else{
		submenu.parentNode.style.visibility="visible"
		submenu.style.visibility="visible"
	}
},
 
revealmenu:function(header, submenu, endpoint, dir){
	var elapsed=new Date().getTime()-submenu._starttime //get time animation has run
	if (elapsed<this.effects.duration){
		if (this.effects.enableswipe){
			if (submenu._curanimatedegree==0){ //reset either width or height of sub menu to "auto" when animation begins
				submenu.parentNode.style[header._istoplevel && dir=="topbar"? "width" : "height"]=(header._istoplevel && dir=="topbar"? submenu.offsetWidth : submenu.offsetHeight)+"px"
			}
			submenu.parentNode.style[header._istoplevel && dir=="topbar"? "height" : "width"]=(submenu._curanimatedegree*endpoint)+"px"
			if (this.effects.enableslide){
				submenu.style[header._istoplevel && dir=="topbar"? "top" : "left"]=Math.floor((submenu._curanimatedegree-1)*endpoint)+"px"
			}
		}
		if (this.effects.enablefade){
			this.setopacity(submenu.parentNode, submenu._curanimatedegree)
		}
	}
	else{
		clearInterval(submenu._animatetimer)
		if (this.effects.enableswipe){
			submenu.parentNode.style.width=submenu.offsetWidth+"px"
			submenu.parentNode.style.height=submenu.offsetHeight+"px"
			submenu.parentNode.style.overflow="visible"
			if (this.effects.enableslide){
				submenu.style.top=0;
				submenu.style.left=0;
			}
		}
		if (this.effects.enablefade){
			this.setopacity(submenu.parentNode, 1)
			submenu.parentNode.style.filter=""
		}
		if (this.enableshim && submenu.FFscrollInfo) //if this is FF browser (meaning shim hasn't been applied yet
			this.positionshim(header, submenu, dir, submenu.FFscrollInfo.x, submenu.FFscrollInfo.y)
	}
	submenu._curanimatedegree=(1-Math.cos((elapsed/this.effects.duration)*Math.PI)) / 2
},
 
hidemenu:function(submenu){
	if (typeof submenu._pos!="undefined"){ //if submenu is outermost DIV drop down menu
		this.css(this.topitems[submenu._master][parseInt(submenu._pos)], "selected", "remove")
		if (this.enableshim)
			this.hideshim()
	}
	clearInterval(submenu.firstChild._animatetimer)
	submenu.style.left=0
	submenu.style.top="-1000px"
	submenu.style.visibility="hidden"
	submenu.firstChild.style.visibility="hidden"
},
 
 
addEvent:function(target, functionref, tasktype) {
	if (target.addEventListener)
		target.addEventListener(tasktype, functionref, false);
	else if (target.attachEvent)
		target.attachEvent('on'+tasktype, function(){return functionref.call(target, window.event)});
},
 
domready:function(functionref){ //based on code from the jQuery library
	if (dd_domreadycheck){
		functionref()
		return
	}
	// Mozilla, Opera and webkit nightlies currently support this event
	if (document.addEventListener) {
		// Use the handy event callback
		document.addEventListener("DOMContentLoaded", function(){
			document.removeEventListener("DOMContentLoaded", arguments.callee, false )
			functionref();
			dd_domreadycheck=true
		}, false )
	}
	else if (document.attachEvent){
		// If IE and not an iframe
		// continually check to see if the document is ready
		if ( document.documentElement.doScroll && window == window.top) (function(){
			if (dd_domreadycheck){
				functionref()
				return
			}
			try{
				// If IE is used, use the trick by Diego Perini
				// http://javascript.nwbox.com/IEContentLoaded/
				document.documentElement.doScroll("left")
			}catch(error){
				setTimeout( arguments.callee, 0)
				return;
			}
			//and execute any waiting functions
			functionref();
			dd_domreadycheck=true
		})();
	}
	if (document.attachEvent && parent.length>0) //account for page being in IFRAME, in which above doesn't fire in IE
		this.addEvent(window, function(){functionref()}, "load");
},
 
 
init:function(mainmenuid, dir){
	this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
	this.topitemsindex=-1
	this.ulindex=-1
	this.topmenuids.push(mainmenuid)
	this.topitems[mainmenuid]=[] //declare array on object
	this.subuls[mainmenuid]=[] //declare array on object
	this.hidetimers[mainmenuid]=[] //declare hide entire menu timer
	if (this.enableshim && !this.shimadded){
		this.shimmy={}
		this.shimmy.topshim=this.addshimmy(document.body) //create top iframe shim obj
		this.shimmy.bottomshim=this.addshimmy(document.body) //create bottom iframe shim obj
		this.shimadded=true
	}
	var menubar=document.getElementById(mainmenuid)
	var alllinks=menubar.getElementsByTagName("a")
	this.getwindowsize()
	for (var i=0; i<alllinks.length; i++){
		if (alllinks[i].getAttribute('rel')){
			this.topitemsindex++
			this.ulindex++
			var menuitem=alllinks[i]
			this.topitems[mainmenuid][this.topitemsindex]=menuitem //store ref to main menu links
			var dropul=document.getElementById(menuitem.getAttribute('rel'))
			var shelldiv=document.createElement("div") // create DIV which will contain the UL
			shelldiv.className="ddsubmenustyle"
			dropul.removeAttribute("class")
			shelldiv.appendChild(dropul)
			document.body.appendChild(shelldiv) //move main DIVs to end of document
			shelldiv.style.zIndex=2000 //give drop down menus a high z-index
			shelldiv._master=mainmenuid  //Indicate which main menu this main DIV is associated with
			shelldiv._pos=this.topitemsindex //Indicate which main menu item this main DIV is associated with
			this.addEvent(shelldiv, function(){ddlevelsmenu.hidemenu(this)}, "click")
			var arrowclass=(dir=="sidebar")? "rightarrowpointer" : "downarrowpointer"
			var arrowpointer=(dir=="sidebar")? this.arrowpointers.rightarrow : this.arrowpointers.downarrow
			if (this.arrowpointers.showarrow.toplevel)
				this.addpointer(menuitem, arrowclass, arrowpointer, (dir=="sidebar")? "before" : "after")
			this.buildmenu(mainmenuid, menuitem, dropul, this.ulindex, true, dir) //build top level menu
			shelldiv.onmouseover=function(){
				clearTimeout(ddlevelsmenu.hidetimers[this._master][this._pos])
			}
			this.addEvent(shelldiv, function(e){ //hide menu if mouse moves out of main DIV element into open space
				if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(ddlevelsmenu.topitems[this._master][parseInt(this._pos)], e)){
					var dropul=this
					if (ddlevelsmenu.enableshim)
						ddlevelsmenu.hideshim()
					ddlevelsmenu.hidetimers[this._master][this._pos]=setTimeout(function(){
						ddlevelsmenu.hidemenu(dropul)
					}, ddlevelsmenu.hideinterval)
				}
			}, "mouseout")
			var subuls=dropul.getElementsByTagName("ul")
			for (var c=0; c<subuls.length; c++){
				this.ulindex++
				var parentli=subuls[c].parentNode
				var subshell=document.createElement("div")
				subshell.appendChild(subuls[c])
				parentli.appendChild(subshell)
				if (this.arrowpointers.showarrow.sublevel)
					this.addpointer(parentli.getElementsByTagName("a")[0], "rightarrowpointer", this.arrowpointers.rightarrow, "before")
				this.buildmenu(mainmenuid, parentli, subuls[c], this.ulindex, false, dir) //build sub level menus
			}
		}
	} //end for loop
	this.addEvent(window, function(){ddlevelsmenu.getwindowsize(); ddlevelsmenu.gettopitemsdimensions()}, "resize")
},
 
setup:function(mainmenuid, dir){
	this.domready(function(){ddlevelsmenu.init(mainmenuid, dir)})
}
 
}