// Ajax Library
function createREQ()
{
	try
 	{
 		req = new XMLHttpRequest(); /* e.g. Firefox */
 	}
 	catch(err1)
 	{
 		try
 		{
 			req = new ActiveXObject('Msxml2.XMLHTTP'); /* some versions IE */
 		}
 		catch(err2)
 		{
 			try
 			{
 				req = new ActiveXObject("Microsoft.XMLHTTP"); /* some versions IE */
 			}
 			catch(err3)
 			{
 				req = false;
 			}
 		}
 	}
 	return req;
}
 
function requestGET(url, query, req)
{ 
	myRand=parseInt(Math.random()*99999999);
	//alert(url+'?'+query+'&rand='+myRand);return false;
	req.open("GET",url+'?'+query+'&rand='+myRand,true);
 	req.send(null);
}
 
function requestPOST(url, query, req)
{
	req.open("POST", url,true);
 	req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 	req.send(query);
}
 
function doCallback(callback,item)
{ 
	//alert(item);
 	if(callback.indexOf('(') == (callback.indexOf(')') - 1) || callback.indexOf('(')  < 0)
 	{
  		callback = callback  + '(item)';
 	}
 	else
 	{
 		arrCallback = callback.split(')');
	  	arrCallback['0'] = arrCallback['0'] + ', item)';
  		callback = arrCallback['0'];
	}
 	eval(callback);
}
 
function doAjax(url,query,callback,reqtype,option,getxml)
{ 
	// create the XMLHTTPRequest object instance
	//alert(url);return false;
 	var myreq = createREQ();
 	myreq.onreadystatechange = function()
 	{
  		if(myreq.readyState == 4)
  		{
   			if(myreq.status == 200)
   			{
    			var item = myreq.responseText;
    			if(getxml==1)
    			{	
     				item = myreq.responseXML;
    			}
    			doCallback(callback, item);
   			}
  		}
  		else
  		{
   			var item;
   			if(option=='1')
   			{
    			item = '<img src="common/images/ajax_loader.gif" title="Loading..." alt="Loading..." />'; 
    			doCallback(callback, item);
   			}
   			else if(option=='2')
   			{
    			item = '<img src="common/images/ajax_loader.gif" title="Loading..." alt="Loading..." style="float:none" />'; 
    			doCallback(callback, item);
   			}
   			else
   			{
    			item = '';
   			}
  		}
 	}
 	if(reqtype=='POST')
 	{
  		requestPOST(url,query,myreq);
 	}
 	else
 	{
  		requestGET(url,query,myreq);
 	}
}