var idBigImgDiv="bigimgdiv";
var idShowBigImg="showbigimg";
var idBigImg="bigimg";
var idContainer="mainframe";
var idBigImgText="bigimgtext";

smallImgClick = function() {
	var sElem;
	var num=0;
	while((sElem=document.getElementById(idShowBigImg+num))!=null)
	{
		sElem.onclick=function(){
			var elem=document.getElementById(idBigImgDiv);
			elem.style.display="block";
			
			var outerframe=document.getElementById(idContainer);
			
			var IpopTop = ((outerframe.offsetHeight - elem.offsetHeight)/2)-100;
      		var IpopLeft = (outerframe.offsetWidth - elem.offsetWidth)/2;
      
      		elem.style.left=IpopLeft + document.body.scrollLeft;
      		elem.style.top=IpopTop + document.body.scrollTop
				
			document.getElementById(idBigImg).src=this.href;
			document.getElementById(idBigImgText).innerHTML=this.title;
			return false;
		}
		num++;
	}
}

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