Clgnoter un formulaire

(caricature)
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>...</title>
 
<script type="text/javascript">
 
var time=0, timer, st;
 
function cligne(f){
 
	time++;
	if(!st){
		st=f
	};
 
	st.visibility = st.visibility == "hidden" ? "visible" : "hidden"
 
 
	if(time<20){
		timer=setTimeout("cligne()",100)
	}
	else{
		clearTimeout(timer);
		st.visibility="visible"
	}
}
 
 
 
</script>
 
</head>
 
<body>
 
 
<div>
	<a href="#frm" onclick="cligne(document.getElementById('f').style)">afficher le formulaire</a>
</div>
 
 
<form id="f" action="" style="text-align:center;padding:20px;background-
 
color:gray;width:300px;visibility:hidden;margin-top:200px">
	<div>
		<a id="frm"> </a>
		<input type="text" name="t" id="t" />
		<input type="submit" value="Envoi" />
	</div>
</form>
 
 
</body>
</html>