var grades = {
	makeRequest:function(url)
	{
        var httpRequest;
        var	d = new Date();
		url = "tabcontent/" + url + ".asp?d=" + d.getMilliseconds();
		
        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            httpRequest = new XMLHttpRequest();
            if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/html');                
            }
        } else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }

        if (!httpRequest) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
        httpRequest.onreadystatechange = function() { grades.displayNewGrade(httpRequest); };
        httpRequest.open('GET', url, true);
        httpRequest.send(null);
    },
	alertContents:function(httpRequest)
	{

        if (httpRequest.readyState == 4) {
            if (httpRequest.status == 200) {
                alert(httpRequest.responseText);
            } else {
                alert('There was a problem with the request.');
            }
        }

    },
	displayNewGrade:function(httpRequest)
	{
		if (httpRequest.readyState == 4) {
            if (httpRequest.status == 200) {
                var obj = document.getElementById("challenge");
                if(httpRequest.responseText == "SESSION TIME OUT") {
                	document.location = "login.asp";
                }
                else {
			obj.innerHTML = httpRequest.responseText;
		}
            } else {
                //
            }
        }		
	}
}