// JavaScript Document

function changeImg() { 
	document.getElementById("imgPrev").innerHTML = "<img src=\"" + this.href + "\" />";
	return false;
}

function addOnClick() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "gallery"){
    		 anchor.onclick = changeImg;
			
		}
 	}
}

window.onload = addOnClick;