function loadFile(file) {
  var objReq = createXMLHttpRequest();
  objReq.open("GET", file, false);
  objReq.send(null);
  if (objReq.responseText != '')
    eval(objReq.responseText);
}

function createXMLHttpRequest() {
   try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) {}
   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
   try { return new XMLHttpRequest(); } catch(e) {}
   alert("XMLHttpRequest not supported");
   return null;
 }