function initPage() {
	var _opacityObj = document.getElementsByTagName('a');
	for (var i=0; i<_opacityObj.length; i++) {
		if (_opacityObj[i].className.indexOf('opacity') != -1) {
			changeopacity(_opacityObj[i],50);
			_opacityObj[i].onmouseover = function(){
				changeopacity(this,100);
			};
			_opacityObj[i].onmouseout = function(){
				changeopacity(this,50);
			};
		}
	}
}
function changeopacity(imageobject, opacity ) {
	var object = imageobject.style;
	object.opacity = ( opacity / 100 );
	object.MozOpacity = ( opacity / 100 );
	object.KhtmlOpacity = ( opacity / 100 );
	object.filter = "alpha(opacity=" + opacity + ")";
}

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