function openPreview(image,w,h)
{
var bars = ",toolbar=no,location=no,directories=no,status=no,menubar=no";
var scrollbars=",scrollbars=no,resizable=no";
var win,left,top,sw,sh;
if (navigator.appName == "Netscape")
{
sh=screen.height;
sw=screen.width;
}
else
{
sh=screen.availHeight;
sw=screen.availWidth;
}
h+=20;
top=(sh>=h)?(sh-h)/2:0;
left=(sw>=h)?(sw-w)/2:0;
if (w>sw) {w=sw; scrollbars=",scrollbars=yes,resizable=yes";}
if (h>sh) {h=sh; scrollbars=",scrollbars=yes,resizable=yes";}
win=open("","","top="+top+",left="+left+",width=" + (w) + ",height=" + (h) + bars + scrollbars );
win.innerWidth = w;
win.innerHeight = h;
win.focus();
win.document.open("text/html", "replace");
win.document.write(''+image+''+"\n"+
'Click the image to close the window
'+"\n"+
''+"\n"+
''
/* +''+
'width='+w+
' height='+h+
' scrollbars="'+scrollbars+'"'+
'