window.onload = function(){
	hide_menu('comm_liste');
	document.getElementById('comm_liste').href = "#";
}

function hide_menu(menu_id){
	element = document.getElementById(menu_id);
		var li = element.parentNode;
		var sous_liste = li.getElementsByTagName("ul")[0];
		var state = sous_liste.style;
		if(state.display == "none") { 
			state.display = "block";
			document.getElementById('page').style.position = "relative";
			document.getElementById('page').style.top = "-158px";
		}
		else{ 
			state.display = "none";
			document.getElementById('page').style.position = "relative";
			document.getElementById('page').style.top = "0";
		}
}