window.onunload = closeWaitWindow;

var windowHandle;

function openWaitWindow() 
{
	var width = 200;
	var height = 100;
	var top = (window.screen.height - height) / 2;
	var left = (window.screen.width - width) / 2;
	
    windowHandle = window.open('/wait.htm','wait','menubar=no,width=' + width + ',height=' + height
		+ ',top=' + top + ',left=' + left);
}

function closeWaitWindow() 
{
    if (windowHandle != null)
            windowHandle.close();
}

function showWait()
{
	openWaitWindow();
	
	return true;
}