function SwitchMenu(obj){
	if(document.getElementById){
	var el = document.getElementById(obj);
	var ar = document.getElementById("cont").getElementsByTagName("DIV");
		if(el.style.display == "none"){
			for (var i=0; i<ar.length; i++){
				ar[i].style.display = "none";
			}
			el.style.display = "block";
		}else{
			el.style.display = "none";
		}
	}
}
function ChangeClass(menu, newClass) { 
	 if (document.getElementById) { 
	 	document.getElementById(menu).className = newClass;
	 } 
} 
document.onselectstart = new Function("return false");


function  verif(form) {

	 if(form.nom.value=="") {
        form.nom.focus();
        return false
    }
	
	if(form.prenom.value=="") { 
        form.prenom.focus();
        return false 
    }
	if(form.demande.value=="") { 
        form.demande.focus();
        return false 
    }
	if(form.commentaires.value=="") { 
        form.commentaires.focus();
        return false 
    }
	return checkemail();
	
	function checkemail(){
	var str=form.email.value
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
		if (filter.test(str))
			dondur=true
		else{
			//alert("Vous devez entrez une adresse email valide !")
			form.email.focus();
			dondur=false
		}
	return (dondur)
	}
	
	
}