function expand_menu(le_menu)
{
	ptr_menu = document.getElementById('le_menu');
	le_sous_menu = le_menu.replace('menu_', 'smenu_');
	la_fleche = le_menu.replace('menu_', 'fleche_');
	
	if(document.getElementById(le_sous_menu).style.display == 'block')
		document.getElementById(le_sous_menu).style.display = 'none';
	else
		document.getElementById(le_sous_menu).style.display = 'block';
	
	
	if(document.getElementById(la_fleche).src.search('fleche_a.gif') != -1 )
		document.getElementById(la_fleche).src = 'image/fleche_b.gif';
	else
		document.getElementById(la_fleche).src = 'image/fleche_a.gif';
	
}

var menuids=["menu_principal"] 

function buildsubmenus_horizontal(){
for (var i=0; i<menuids.length; i++){
  var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul")
    for (var t=0; t<ultags.length; t++){
		if (ultags[t].parentNode.parentNode.id==menuids[i]){ //if this is a first level submenu
			ultags[t].style.top=ultags[t].parentNode.offsetHeight+"px" //dynamically position first level submenus to be height of main menu item
			ultags[t].parentNode.getElementsByTagName("a")[0].className="mainfoldericon"
		}
		else{ //else if this is a sub level menu (ul)
		  ultags[t].style.left=ultags[t-1].getElementsByTagName("a")[0].offsetWidth+"px" //position menu to the right of menu item that activated it
		  ultags[t].style.top=ultags[t-1].getElementsByTagName("a")[0].offsetTop+"px"
    	ultags[t].parentNode.getElementsByTagName("a")[0].className="subfoldericon"
		}
    ultags[t].parentNode.onmouseover=function(){
    this.getElementsByTagName("ul")[0].style.visibility="visible"
    }
    ultags[t].parentNode.onmouseout=function(){
    this.getElementsByTagName("ul")[0].style.visibility="hidden"
    }
    }
  }
}

if (window.addEventListener)
window.addEventListener("load", buildsubmenus_horizontal, false)
else if (window.attachEvent)
window.attachEvent("onload", buildsubmenus_horizontal)