var HoverEffect = function()
{
	var _element = new Object();
	
	var highlighted = "";
	
	this.addElement = function(objID, normalImage, highlightImage)
	{
		var obj = new Array();
		
		var img = new Image();
		img.src = normalImage;
		
		obj.push(img);
		
		img = new Image();
		img.src = highlightImage;
		
		obj.push(img);
		
		_element[objID] = obj;
	}
	
	this.showNormal = function(objID)
	{
		if (highlighted != objID)
		{
			document.images[objID].src = _element[objID][0].src;
		}
	};
	
	this.showHighlight = function(objID)
	{

		document.images[objID].src = _element[objID][1].src;

	};
	
	this.setHighlighted = function(objID)
	{
		highlighted=objID;
	};
	
};