function createRequestObject() {
   var req;
   if(window.XMLHttpRequest)
	  req = new XMLHttpRequest();
   else if(window.ActiveXObject)
	  req = new ActiveXObject("Microsoft.XMLHTTP");
   return req;
}
var http = createRequestObject();

function telHit(id) {
	http.open('get', 'tel_hit.php?id=' + id);
	http.send(null);
}