var apl_usager_exist = domaine + '/app/usagerExist.php';

function usagerExist(usager) 
{
	obj.requestFile = apl_usager_exist + '?usager=' + usager;
	obj.onCompletion = function(){ document.getElementById("usagerEtat").innerHTML = '<STRONG>'+obj.response+'</STRONG>';};
	obj.runAJAX();
}