var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest(InitializeRequest);
prm.add_endRequest(EndRequest);

//
// Sets the mouse cursor to hourglass.
//
function InitializeRequest(sender, args) {
	$get('wrapper').style.cursor = 'wait';
}

//
// Sets the mouse cursor to normal.
//
function EndRequest(sender, args) {
	$get('wrapper').style.cursor = 'auto';
}