stHover = function() {
	var cssRule;
	var newSelector;
	for (var i = 0; i < document.styleSheets.length; i++)
		for (var x = 0; x < document.styleSheets[i].rules.length ; x++)
			{
			cssRule = document.styleSheets[i].rules[x];
			if (cssRule.selectorText.indexOf("LI:hover") != -1)
			{
				 newSelector = cssRule.selectorText.replace(/LI:hover/gi, "LI.iehover");
				document.styleSheets[i].addRule(newSelector , cssRule.style.cssText);
			}
		}
	var getElm = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<getElm.length; i++) {
		getElm[i].onmouseover=function() {
			this.className+=" iehover";
		}
		getElm[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" iehover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", stHover);

function envoieRequete(url,id)
{
	var xhr_object = null;
	var position = id;
	   if(window.XMLHttpRequest)  xhr_object = new XMLHttpRequest();
	  else
	    if (window.ActiveXObject)  xhr_object = new ActiveXObject("Microsoft.XMLHTTP"); 

	// On ouvre la requete vers la page désirée
	xhr_object.open("GET", url, true);
	xhr_object.onreadystatechange = function(){
	if ( xhr_object.readyState == 4 )
	{
		// j'affiche dans la DIV spécifiées le contenu retourné par le fichier
		document.getElementById(position).innerHTML = xhr_object.responseText;
	}
	}
	// dans le cas du get
	xhr_object.send(null);

}