function liens(param){
 var  u = document.location.href+'\&';
   	//u = document.URLencoded+'\&';
	var n = u.indexOf('\?');
	u = u.substring(n+1);
	
	n =  u.indexOf(param+"=");
	if (n<0){return ''};
	u = u.substring(n+1);
	n = u.indexOf("=");
	var m = u.indexOf('\&');
	return u.substring(n+1, m);
	
}