function ajax(url)
{  
    var xmlHttp;
    var ajaxResult="";
    
	try
	{
		xmlHttp=new XMLHttpRequest();
	}
	catch (e)
    {    
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
      		catch (e)
        	{        
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	if (url.indexOf("?")==-1) url+="?";
	else url+="&";
	url+="rnd="+Math.random()*1000;
    xmlHttp.open("GET",url,false);
    xmlHttp.send(null);
    if(xmlHttp.readyState==4)
    {
		ajaxResult=xmlHttp.responseText;
    }
    
    return ajaxResult; 
}