// set query string

function SetSession(SiteMapName,SiteMapId) {

    if (SiteMapId > 0) {
        Ajax = GetXmlHttpObject();
        if (Ajax == null) {
            alert("Your browser does not support AJAX!");
            return;
        }
        try {
            var url = "SetSession.aspx?" + SiteMapName + "=" + SiteMapId;
            Ajax.open("GET", url, true);
            Ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; text/xml; charset=UTF-8");
            Ajax.send(null);
        }
        catch (ex) {
            alert(ex)
        }
    }
}

function RemoveSession() {

    Ajax = GetXmlHttpObject();
    if (Ajax == null) {
        alert("Your browser does not support AJAX!");
        return;
    }
    try {
        var url = "SetSession.aspx";
        Ajax.open("GET", url, true);
        Ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; text/xml; charset=UTF-8");
        Ajax.send(null);
    }
    catch (ex) {
        alert(ex)
    }
}

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;
}