function initPage()
{
	divs = document.getElementsByTagName("div");
	for (var i=0; i<divs.length; i++)
	{
		if (divs[i].className == "tales")
		{
			 var images = divs[i].getElementsByTagName("img");
			 for (var j=0; j<images.length; j++)
			 {               
				   images[j].onmouseover = function()
				   {
					  this.src = this.src.replace(".gif", "-over.gif");
				   }
				   images[j].onmouseout = function()
				   {
						this.src = this.src.replace("-over.gif", ".gif");
				   }
			 }
		}
	}
}

if (window.addEventListener)
     window.addEventListener("load", initPage, false);
else if (window.attachEvent)
     window.attachEvent("onload", initPage);