var Forum = {
	/* attach FN to WINDOW.ONLOAD handler */
	addLoadEvent: function(fn)
	{
		var x = window.onload;
		window.onload = (x && typeof x=='function') ? function(){x();fn()} : fn;
	},
	/* return TRUE if node N has class X, else FALSE */
	hasClass: function(n, x)
	{
		return (new RegExp('\\b' + x + '\\b')).test(n.className)
	},
	/* add X class to N node, return TRUE if added, FALSE if already exists */
	addClass: function(n, x)
	{
		if (Forum.hasClass(n, x)) return false;
		else n.className += ' ' + x;
		return true;
	},
	/* remove X class from N node, return TRUE if removed, FALSE if not present */
	removeClass: function(n, x)
	{
		if (!Forum.hasClass(n, x)) return false;
		x = new RegExp('\\s*\\b' + x + '\\b', 'g');
		n.className = n.className.replace(x, '');
		return true;
	},
	/* blink node N twice */
	blink: function(n, i)
	{
		if (typeof i == 'undefined') i = 2;
		var x = n.style.visibility;
		if (i && x!='hidden')
		{
			n.style.visibility = 'hidden';
			setTimeout(function(){n.style.visibility=x}, 200);
			setTimeout(function(){Forum.blink(n,i-1)}, 400);
		}
	},
	/* return true if node N scrolled into view, else false (y axis only) */
	onScreen: function(n)
	{
		function pageYOffset() // return number of pixels page has scrolled
		{
			var y = -1;
			if (self.pageYOffset) y = self.pageYOffset; // all except IE
			else if (document.documentElement && document.documentElement.scrollTop)
				y = document.documentElement.scrol