function initPage()
{
	var divs = document.getElementsByTagName("div");
	for (var i=0; i<divs.length; i++)  {
		if (divs[i].className == "box1")  {
			divs[i].onmouseover = function()
			{
			this.className += " hover-div";
			}
			divs[i].onmouseout = function()
			{
			this.className = this.className.replace(" hover-div", "");
			}
		}
	}
}

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