function chargement(cas)
{
		if(cas=='o')
			{
			document.write("<em>chargement en cours....<em>");
			}
		else if(cas=='n')
			{
			document.getElementById("Layer1").style.display="none";
			}
}

function GetQueryStringVal(lQuery)
{
var lDoc=String(document.location); 
var lSignet = ""; 
var n1 = lDoc.indexOf("?"); 
if (n1 > 0) 
{ 
  var n2 = lDoc.indexOf("?" + lQuery + "=",n1); 
  if (n2 < n1) 
    n2 = lDoc.indexOf("&" + lQuery + "=",n1); 
  if (n2 >= n1) 
  { 
    n2 = n2 + ("?" + lQuery + "=").length; 
    var n3 = lDoc.indexOf("&",n2+1); 
    if (n3 > n2) 
      lSignet = lDoc.substring(n2, n3); 
    else 
      lSignet = lDoc.substring(n2); 
  } 
}
return lSignet;

}