function showThumb(pFileName,pTitle,pWidth,pHeight)
{
var sW = parseInt(screen.availWidth/2);
var sH = parseInt(screen.availHeight/2);
var iW = parseInt( pWidth /2);
var iH = parseInt( pHeight /2);
var left = parseInt(sW - iW);
var top = parseInt(sH - iH);
var windowFeatures = "left=" +left+ ",top=" +top+ "screenX=" +left+ ",screenY=" +top+",toolbars=no,location=no,directories=no,status=no,menubar=no";
var win = window.open("","win",windowFeatures);
with (win.document)
{
open("text/html", "replace");
write('' +pTitle+ '