window.onload = setroll;
var t;

function setroll() {
	t = document.getElementById("thumbnails");
	var ta = t.getElementsByTagName("a");
		for(i=0; i<ta.length; i++) {
			ta[i].onmouseover = bright;
			ta[i].onmouseout = dim;
			setOpacity(ta[i],20);
			} 
	}

function dim() {
	setOpacity(this, 20);
	}
function bright() {
	setOpacity(this, 100);
	}

function setOpacity(obj,opacity) {
	opacity = (opacity == 100)?99.999:opacity;
	// IE/Win
	obj.style.filter = "alpha(opacity:"+opacity+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = opacity/100;
	// Older Mozilla and Firefox
	obj.style.MozOpacity = opacity/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = opacity/100;
	//alert(opacity/100 + " on: " + obj.innerHTML);
	}