function popup(url,img_h,img_v,caption)
{
img_h_space = 20;
img_v_space = 75;
window_h = parseInt(img_h) + img_h_space;
window_v = parseInt(img_v) + img_v_space;
options = 'toolbar=0' +
',status=0' +
',menubar=0' +
',scrollbars=0' +
',resizable=0' +
',width=' + window_h +
',height=' + window_v;
img_tag = "![]("+url+")
";
content =
"" +
img_tag + "
" + caption + "" +
"" +
"";
body = window.open("","content",options);
body.document.write(content);
}