function zoom(elementName){
var zoomFactor=6;
screenwidth=screen.availWidth;
screenheight=screen.availHeight;
//retrieve the info we need from the DOM,
img = document.getElementById(elementName);
var imgSrc = img.src;
var imgAlt = img.alt;
var imgWidth = img.width;
var imgHeight = img.height;
var imgAspectRatio=(imgHeight/imgWidth);
var zoomWidth=imgWidth + (imgWidth*zoomFactor);
var zoomHeight=zoomWidth*imgAspectRatio;
var top = (screenheight/2) - (zoomHeight/2);
var left = (screenwidth/2) - (zoomHeight/2);
//Going to to determine the window title from the ALT text
winTitle = imgAlt;
newWindow = window.open("","Oldsea","width="+(zoomWidth+40)+", height="+(zoomHeight+40)+", scrollbars=no, top="+top+", left=" + left);
newWindow.document.write(""+winTitle+"");
newWindow.document.write("");
newWindow.document.write("");
newWindow.document.write("