// JavaScript Document
/*
        Created By  : Gladwin George Peter
        Description : Ajax Functions
*/
/* --------------------------   AJAX FUNCTION STARTS HERE  -------------------------- */
/*
Return the id of the attribute.
*/
//alert("carga");
function $(id){return document.getElementById(id);}
//--------------------------------------------------------------------------------------------------//
//--------------------------------------------------------------------------------------------------//
/*
Return the xmlHttpObject
*/
function GetXmlHttpObject(handler)
{
        var objXmlHttp=null
        if (navigator.userAgent.indexOf("Opera")>=0)
        {
                //alert("Opera Is Not Supporting. Use Some Other Browsers")
                //return
                objXmlHttp=new XMLHttpRequest();
                objXmlHttp.onload=handler;
                objXmlHttp.onerror=handler;
                return objXmlHttp;
        }
        if (navigator.userAgent.indexOf("MSIE")>=0)
        {
                var strName="Msxml2.XMLHTTP";
                if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
                {
                        strName="Microsoft.XMLHTTP";
                }
                try
                {
                        objXmlHttp=new ActiveXObject(strName);
                        objXmlHttp.onreadystatechange=handler;
                        return objXmlHttp;
                }
                catch(e)
                {
                        alert("Error. Scripting for ActiveX might be disabled");
                        return;
                }
        }
        if (navigator.userAgent.indexOf("Mozilla")>=0)
        {
                objXmlHttp=new XMLHttpRequest();
                objXmlHttp.onload=handler;
                objXmlHttp.onerror=handler;
                return objXmlHttp;
        }
}
//--------------------------------------------------------------------------------------------------//
/*
Send an ajax request to the url mentioned
URL            : SERVER SIDE SCRIPT NAME
PARAMETERS : URL parameters
callback   : callback function
requesttype: POST OR GET
async      : asycronous or synchronous, TRUE or FALSE
*/
function makeRequest(url,parameters,callback,requesttype,async)
{

        if(requesttype=='POST')
        {
                xmlHttp=GetXmlHttpObject(callback)
                xmlHttp.open("POST",url,async);
                xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
                xmlHttp.send(parameters);
        }else if(requesttype=="GET")
        {
                url    = url+'?'+parameters;
                xmlHttp=GetXmlHttpObject(callback)
                xmlHttp.open("GET", url , async)
                xmlHttp.send(null)
        }
}