var xmlHttp;

function createXMLHttpRequest()
{
    //try 
    //{
    //     netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
    //} 
    //catch (e) 
    //{
        //alert("Permission UniversalBrowserRead denied.");
    //}
    
    if (window.ActiveXObject)
    {
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if (window.XMLHttpRequest)
    {
        xmlHttp = new XMLHttpRequest();
    }
}

function LogPageEnter(Subject,Page,TopicNum,SubTopic,Exercise,Display,Unit,unitTask,NTK,subTask)
{
    createXMLHttpRequest();
    url="http://walkabout.infotech.monash.edu.au/walkabout/LogPageEnter.aspx?Subject="+Subject+"&Page="+Page+"&TopicNum="+TopicNum+"&SubTopic="+SubTopic+"&Exercise="+Exercise+"&Display="+Display+"&Unit="+Unit+"&unitTask="+unitTask+"&NTK="+NTK+"&subTask="+subTask;
    xmlHttp.open("GET", url, true);
    xmlHttp.send();
    return false;    
}

/*function LogPageEnter(Subject,Page,TopicNum,SubTopic,Exercise,Display,Unit)
{
    window.alert("Log Page Enter");
    return false;    
}*/

function LogPageLeave()
{
    createXMLHttpRequest();
    url="http://walkabout.infotech.monash.edu.au/walkabout/LogPageLeave.aspx";
    xmlHttp.open("GET", url, true);
    xmlHttp.send();
    return false;     
}


function displaySQL()
{
    if ((xmlHttp.readyState == 4))
    {
        //document.write(xmlHttp.responseText);
        window.alert(xmlHttp.responseText);
    }
}