function findPos(obj)
{
	var curleft = curtop = 0;
	if (obj.offsetParent)
	{
		curleft = obj.offsetLeft;
		curtop = obj.offsetTop;
		while (obj = obj.offsetParent)
		{
			curleft += obj.offsetLeft;
			curtop += obj.offsetTop;
		}
	}
	return {x:curleft, y:curtop};
}

function trocaImagem(imgObj)
{
	src = imgObj.src; 
	if(src.indexOf("__over")!=-1)
	{
		srcNew = src.replace("__over",""); 
	}
	else
	{
		srcNew = src.replace(".gif","__over.gif"); 
	}
	
	imgObj.src = srcNew; 
}


function loadImgOver()
{
	overImagesArray = document.getElementsByTagName("img"); 
	
	for(i=0;i<overImagesArray.length;i++)
	{
		isOver = overImagesArray[i].getAttribute("over")=="true";

		if(isOver) 
		{
			overImagesArray[i].onmouseover = function()
			{
				trocaImagem(this);
			}
			
			overImagesArray[i].onmouseout = function()
			{
				trocaImagem(this);
			}
		}
	}
}