Using ajax to submit a request to asp

Question

I'm currently using the onbeforeunload event in the body tag to run a function when the window is closed. at that point it runs an ajax function to submit a "logout" time for the application.
However, this works perfectly fine in Firefox and IE(on both mac and PC). It will get to the function, but then doesn't seem to want to run the asp page(which basically just puts in the time for the current user).
I'm not sure what I'm doing wrong:
function GetXmlHttpObject() {
var objXMLHttp = null;
if (window.XMLHttpRequest) {
objXMLHttp = new XMLHttpRequest();
} else if (window.ActiveXObject) {
objXMLHttp = new ActiveXObject("Microsoft.XMLHTTP");
} else {
alert("Please use IE6(or greater),Firefox, or new verion of safari");
return objXMLHttp;
} // End of function
function doUnload()
var xhr;
//this
xhr=GetXmlHttpObject();
url="../admin/logoff-actions-BBLT.asp";
xhr.open("POST",url,true);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.send(null);
//alert("closing up the window");
</script>

Answer 1

(which basically just puts in the time for the current user).
What format is the date and time, bob? Apparently Safari has some trouble interpreting certain date and time formats in some circumstances. See:
http://discussions.apple.com/message.jspa?messageID=10740462#10740462