function filter(strURL,type)
{         
	//var req = getXMLHTTP(); // fuction to get xmlhttp object
	
	var req;
	
	try
    {  // Firefox, Opera 8.0+, Safari  xmlHttp=new XMLHttpRequest();  
		req = new XMLHttpRequest();
		req.overrideMimeType('text/xml');

	}
	catch (e)
	{
		try
		{  // Internet Explorer
			req = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) 
		{
			alert("Your browser does not support AJAX!");
		}
	}
	
	req.onreadystatechange = function()
	{
	  	if (req.readyState == 4) //data is retrieved from server
	   		//if (req.status == 200) // which reprents ok status
			if (type == 1)                    
		 		document.getElementById('province').innerHTML = req.responseText;
			else
				document.getElementById('town').innerHTML = req.responseText;
			//alert('hello');
	}

	req.open("GET", strURL, true); //open url using get method
	req.send(null);
	
	//alert(strURL);
}