var xmlHttp


function ajax_post(url, params, response)
{
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Your browser does not support AJAX!");
		return;
	} 
	
	url = url;
	params = params;
	
	xmlHttp.onreadystatechange = response;
	xmlHttp.open('POST', url, true);
	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp.setRequestHeader("Content-length", params.length);
	xmlHttp.setRequestHeader("Connection", "close");
	xmlHttp.send(params);
	
}

function ajax_get(url, params, response)
{
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Your browser does not support AJAX!");
		return;
	} 
	
	url = url;
	url = url + "?"+params;
	url = url + "&sid="+Math.random();
	
	xmlHttp.onreadystatechange = response;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);

	
}

function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
  {
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
  }
	catch (e)
  {
		// Internet Explorer
		try
		{
		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
  }
	return xmlHttp;
}