var styleClassArray = new Array();
	function enterClass( obj, className )
	{
		styleClassArray[obj] = obj.className;
		obj.className = /*obj.className + " " +*/ className;
	}
	
	function leaveClass( obj )
	{
		obj.className = styleClassArray[obj];
	}

	
	//+ Jonas Raoni Soares Silva
	//@ http://jsfromhell.com/array/shuffle [rev. #1]
	shuffle = function(v)
	{
		for(var j, x, i = v.length; i; j = parseInt(Math.random() * i), x = v[--i], v[i] = v[j], v[j] = x);
		return v;
	};