function get_modele(emot)
{
	marqueencours=document.getElementById('marque').options[document.getElementById('marque').selectedIndex].value;

   var xhr_object = null;
   if(window.XMLHttpRequest) // Firefox
	  xhr_object = new XMLHttpRequest();
   else if(window.ActiveXObject) // Internet Explorer
	  xhr_object = new ActiveXObject("Microsoft.XMLHTTP");

	xhr_object.open("POST", "/getmodeles.php", true);
   	xhr_object.onreadystatechange = function() {
      if(xhr_object.readyState == 4) {eval(xhr_object.responseText); }
  		}
   xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
   var data = "idmarque="+marqueencours+"&mot="+emot;
   xhr_object.send(data);
}