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


// for advice description
function advice_des(str,field)
{ 
var xmlHttpDes=createXMLHttpRequest();
if (xmlHttpDes==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
 
var url="advice_description.php?q="+str+"&field="+field+"&siid="+Math.random();
xmlHttpDes.open("GET",url,true)
xmlHttpDes.onreadystatechange = function() {
  if (xmlHttpDes.readyState != 4)  { return; }
  if (xmlHttpDes.status != 200)  { return; }   
    var xml =xmlHttpDes.responseText	
	 document.getElementById('subhead').innerHTML=xmlHttpDes.responseText; 
	
}
xmlHttpDes.send(null);
}