function showPic (whichpic) {
var  imglink = whichpic.getAttribute("href");
var placeholder = document.getElementById("photo");
placeholder.setAttribute("src",imglink);

//var imgttl = whichpic.getAttribute("title");
//var ttl = document.getElementById("title");
//ttl.firstChild.nodeValue= imgttl;
}

function prepareGallery () {
var gallery = document.getElementById("imgList");
var links = gallery.getElementsByTagName("a");
for ( var i = 0; i < links.length; i++) {
links[i].onclick = function() {
showPic(this);
return false;
}
}
}

window.onload = prepareGallery;