function CreateXmlHttpObject() { //fuction to return the xml http object
		var xmlhttp=false;
		try{
			xmlhttp=new XMLHttpRequest();//creates a new ajax object
		}
		catch(e)	{
			try{
				xmlhttp= new ActiveXObject("Microsoft.XMLHTTP");//this is for IE browser
			}
			catch(e){
				try{
				req = new ActiveXObject("Msxml2.XMLHTTP");//this is for IE browser
				}
				catch(e1){
					xmlhttp=false;//error creating object
				}
			}
		}

		return xmlhttp;
	}


  function CategoryGrab(strURL)
    {
    	var tokn=Math.random()*10000;
     var req = CreateXmlHttpObject(); // fuction to get xmlhttp object
     if (req)
     {
      req.onreadystatechange = function()
     {
		 if(req.readyState==1)
		 {
			 document.getElementById('status').innerHTML='Wait..';
	     }
		 else
		 {
			 document.getElementById('status').innerHTML='';
		 }
      if (req.readyState == 4) { //data is retrieved from server
       if (req.status == 200) { // which reprents ok status
         document.getElementById('subcategory').innerHTML=req.responseText;//put the results of the requests in or element
      }
      else
      {
         alert("There was a problem while using XMLHTTP:\n");
      }
      }
      }
    req.open("GET", strURL+"&tok="+tokn, true); //open url using get method
    req.send(null);//send the results
     }
    }