function writeCookie(name, data, noDays){
  var cookieStr = name + "="+ data
  if (writeCookie.arguments.length > 2){
    cookieStr += "; expires=" + getCookieExpireDate(noDays)
    }
  document.cookie = cookieStr
}

function readCookie(cookieName){
   var searchName = cookieName + "="
   var cookies = document.cookie
   var start = cookies.indexOf(cookieName)
   if (start == -1){ // cookie not found
     return ""
     }
   start += searchName.length //start of the cookie data
   var end = cookies.indexOf(";", start)
   if (end == -1){
     end = cookies.length
     }
   return cookies.substring(start, end)
}

function blocking(nr, cookie, vis_state)
{
	if (document.layers)
	{
		current = (document.layers[nr].display == 'none') ? vis_state : 'none';
		if (cookie != '')
			writeCookie(nr, current);
		document.layers[nr].display = current;
	}
	else if (document.all)
	{
		current = (document.all[nr].style.display == 'none') ? vis_state : 'none';
		if (cookie != '')
			writeCookie(nr, current);
		document.all[nr].style.display = current;
	}
	else if (document.getElementById)
	{
		display = (document.getElementById(nr).style.display == 'none') ? vis_state : 'none';
		if (cookie != '')
			writeCookie(nr, display);
		document.getElementById(nr).style.display = display;
	}
}
function verif() {
	if((form1.nom.value=="") || (form1.nom.value.replace(/^ */,'').replace(/ *$/,'').length<1)) 
	{
		alert("Veuillez entrer votre nom, svp ..."); 
                form1.nom.focus();
                return false;
	}
	else if((form1.msg_body.value=="") || (form1.msg_body.value.replace(/^ */,'').replace(/ *$/,'').length<1)) 
	{
		alert("Veuillez entrer votre commentaire, svp ..."); 
                form1.msg_body.focus();
                return false;
	}
	else if((form1.email.value == "") ||
           (form1.email.value.replace(/^ */,'').replace(/ *$/,'').length<1))
	{
		
	}
	else if ((form1.email.value.indexOf("@")<0)||(form1.email.value.indexOf(".")<0))
	{
         alert("L'adresse E-Mail est invalide !");
         form1.email.focus();
         return false;
        } 
	else {
          return true;
        }
}