function xmlhttpPost(id, url, querystring) 
{
	
    var xmlHttpReq = false;
    
    if (window.XMLHttpRequest) 
    {	// Mozilla/Safari
        xmlHttpReq = new XMLHttpRequest();
    }
    else if (window.ActiveXObject) 
    {	// IE
        xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    
    xmlHttpReq.open('POST', url, true);
    xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlHttpReq.onreadystatechange = function() 
    {
        if (xmlHttpReq.readyState == 4) 
        {
        	if(id!='')
        	{
        		//alert(xmlHttpReq.responseText);
        	
        		document.getElementById(id).innerHTML = xmlHttpReq.responseText + ' ';
        	}
        	else
        	{
        		alert(xmlHttpReq.responseText);
        	}
        }
    }
    
    xmlHttpReq.send(querystring);
    
}