/**************************************
» Fatih Çolak
» http://www.fatihcolak.com
» Created : 10.02.2008
» Modified : 28.04.2008
************************************* */

function CreateHTTPRequest()
{
    var oHTTPRequest = null;
    if (window.XMLHttpRequest) /* Mozilla, Safari,...  */
    {
	    oHTTPRequest = new XMLHttpRequest();
	    if (oHTTPRequest.overrideMimeType)
		    oHTTPRequest.overrideMimeType("text/xml");
    } 
    else if (window.ActiveXObject) /* IE */
    {
	    try { oHTTPRequest = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { }
	    try { oHTTPRequest = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
    }

    if (oHTTPRequest == null)
    {
	    alert("Cannot create XMLHTTP instance");
	    return null;
    }
    else
        return oHTTPRequest;
}

/**************************************
    bPostMethod : true = POST, false = GET (bool)
    sUrl : Url with Parameters (string)
    sCallbackFunction : Callback Function Name (string)
    bGetValue : Get Result Object = true, or not = false
    bXml : Returns Object is XML = true, or Text = false (bool)
    oReturnParams : Set parameter to Callback function (object)
**************************************/

function MakeAjaxRequest(bPostMethod, sUrl, sCallbackFunction, bGetValue, bXml, oReturnParams)
{
    oHTTPRequest = CreateHTTPRequest();
    oHTTPRequest.onreadystatechange = function() 
    {
	    if (oHTTPRequest.readyState == 4)
	    {
	        if (sCallbackFunction == "")
	        {
	            if (oHTTPRequest.status != 200)
		            alert("There was a problem with the request.(Code: " + oHTTPRequest.status + ")");
	        }
	        else
	        {
		        if (oHTTPRequest.status == 200)
		        {
					var sRetVal = "";
					
					if (oReturnParams != "")
						sRetVal = ",'" + oReturnParams + "'";
					
		            if (bGetValue)
		            {
		                if (bXml)
		                    eval(sCallbackFunction + "(oHTTPRequest.responseXML" + sRetVal + ");");
		                else
							eval(sCallbackFunction + "(oHTTPRequest.responseText" + sRetVal + ");");
		            }
		            else
		                eval(sCallbackFunction + "(" + sRetVal + ");");
		        }
		        else
			        alert("There was a problem with the request.(Code: " + oHTTPRequest.status + ")");
			}
	    }
    }
    if (bPostMethod)
        oHTTPRequest.open("POST", sUrl, true);
    else
        oHTTPRequest.open("GET", sUrl, true);

    oHTTPRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    oHTTPRequest.send(null);
}

/*  MakeAjax Functions.. */

function MakeAjaxRequestG(sUrl)
{
    MakeAjaxRequest(false, sUrl, "", false, false, "");
}

function MakeAjaxRequestGC(sUrl, sCallbackFunction)
{
    MakeAjaxRequest(false, sUrl, sCallbackFunction, false, false, "");
}

function MakeAjaxRequestGCG(sUrl, sCallbackFunction)
{
    MakeAjaxRequest(false, sUrl, sCallbackFunction, true, false, "");
}

function MakeAjaxRequestGCGR(sUrl, sCallbackFunction, oReturnParams)
{
	MakeAjaxRequest(false, sUrl, sCallbackFunction, true, false, oReturnParams);
}

function MakeAjaxRequestGCGX(sUrl, sCallbackFunction, oReturnParams)
{
    MakeAjaxRequest(false, sUrl, sCallbackFunction, true, true, oReturnParams);
}

/* Post Method Functions */

function MakeAjaxRequestPGC(sUrl, sCallbackFunction)
{
    MakeAjaxRequest(true, sUrl, sCallbackFunction, true, false, "");
}