function checkForm(){
	Masque_OBJ('alert_name','alert_email','alert_message');
        if(document.getElementById('idname').value == ""){
                Affiche_OBJ('alert_name');
        }
        if((document.getElementById('idmessage').value == "500 caractères maximum ...")||(document.getElementById('idmessage').value == "")){
                Affiche_OBJ('alert_message');
        }
		var mailadress=document.getElementById('idemail').value;
		var place = mailadress.indexOf("@",1);
		var point = mailadress.indexOf(".",place+1);
		if ((place > -1)&&(mailadress.length >2)&&(point > 1))
		{
		}
		else
		{
		Affiche_OBJ('alert_email');
		return false;
		}
        if((document.getElementById('idname').value == "")||(document.getElementById('idmessage').value == "500 caractères maximum ...")||(document.getElementById('idmessage').value == "")){
			return false;
		}
	return true;
}