function Preview( URL, WIDTH, HEIGHT) {
windowprops = "left=50,top=50,width=" + (WIDTH+50) + ",height=" + (HEIGHT+50);
text = "Preview"
+ ""
+ ""
+ "![](" + URL + ")
"
+ "[close]"
+ "";
preview = window.open("", "preview", windowprops);
preview.document.open();
preview.document.write(text);
preview.document.close();
}