调用js 死活调用不了

以下时代吗

function showPic(whichpic){
	var source = whichpic.getAttribute("href");
	var place = document.getElementById("place");
	place.setAttribute("src",source);
	var text = whichpic.getAttribute("title");
	var descripton = document.getElementById("descripton");
	descripton.firstChild.nodeValue = text;
}
widow.onload = prepareGallery;
function prepareGallery(){
	
	var gallery = document.getElementById("imagegallery");
	var links = gallery.getElementsByTagName("a");
	for (var i=0; i < links.length;  i++) {
			links[i].onclick = function (){
			showPic(this);
			return false;
		}
	}
}

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报什么错啊？

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请使用Google Chrome DevTools

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window.onload
少了个n