Image Zooming - OnmouseOver and mouseOut -Gridview

<script type="text/javascript"> window.onkeypress = keypress; function keypress(e) { if (e.keyCode == 27) { HideDiv(); } } </script> <script type="text/javascript">
function LoadDiv(url) {
var img = new Image();
var bcgDiv = document.getElementById("divBackground");
var imgDiv = document.getElementById("divImage");
var imgFull = document.getElementById("imgFull");
var imgLoader = document.getElementById("imgLoader");
imgLoader.style.display = "block"; img.onload = function () {
imgFull.src = img.src;
imgFull.style.display = "block";
imgLoader.style.display = "none";
};
img.src = url;
var width = document.body.clientWidth;
if (document.body.clientHeight > document.body.scrollHeight) {
bcgDiv.style.height ...