// 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);
        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);
        //eval(callback + '(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
        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 = '<div style="display: block;" class="cal_box"><div class="cal_box_center"><div class="cal_box_top"><div class="cal_box_bottom"><div class="cal_box_inner"><div></div><div class="loading_bar"><img alt="" src="common/images/loading.gif"></div></div></div></div></div></div>';    
                                doCallback(callback, item);
                        }
                        else if(option=='2')
                        {
                                item = '<div style="display: block;" class="cal_box"><div class="cal_box_center"><div class="cal_box_top"><div class="cal_box_bottom"><div class="cal_box_inner"><div></div><div class="loading_bar"><img alt="" src="common/images/loading.gif"></div></div></div></div></div></div>';
                                doCallback(callback, item);
                        }
                        else
                        {
                                item = '';
                        }
                }
        }
		if(reqtype=='post' || reqtype=='POST')
        {
                requestPOST(url,query,myreq);
        }
        else
        {
                requestGET(url,query,myreq);
        }
}