The abstract class indicates that a class may be used
as a base class for other classes and is not instantiable.

the following javascript codes will help you find
out the browser details by some javascript functions

jquery dialog is not only best for showing only content but
also can be used to show form,buttons for postback.......
but for this jquery dialog must be appended to form as -

when you submit form with input and select
controls,the values of these controls are
passed with form.we get these as POST var-
$_POST["controlname"];

this post will show how to implement image loader in any page.
basically i will show a loading image per image before image
is loaded completely in the page.