IEMHover = function() {    
	var IEMh = document.getElementById("menunav").getElementsByTagName("LI"); 
    for (var i=0; i<IEMh.length; i++) {         
				IEMh[i].onmouseover=function() {             
						this.className+=" IEMhover";         
				}
				IEMh[i].onmouseout=function() {   
						this.className=this.className.replace(new RegExp(" IEMhover\\b"), ""); 
				}    
	}
}
if (window.attachEvent) window.attachEvent("onload", IEMHover); 


function popupcentree(page,largeur,hauteur,options) {    

var top=(screen.height-hauteur)/2;     

var left=(screen.width-largeur)/2;     

window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options); }