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From above scripts we can draw these conclusions:

Refer to:
$(document).ready() and pageLoad() are not the same!

Avoid (403) Forbidden errors when using HttpWebRequest

To access local IIS Web sites, you must run Visual Studio in the context of an administrator account. By default, Windows runs applications in a limited-rights user account even when you are logged on to the computer as an administrator.

 http://www.sourcecodeonline.com/

ResolveUrl and ResolveClientUrl are two methods that help to resolve "~/" prefixed format path to client-browser-usable format. Normally , they take the same effective and just differ in the terminate displaying . Then assuming such a control-holser environment : a UserControl which is designed to shared by a batch of pages; Initially we still find no problems by using either ResolveUrl or ResolveClientUrl to treat url issues in the control , however , if we "cache" the UserControl , mark it with "shared" attribute, and adopt it into an application of multiple pages in different directories , a problem is possible to occur .

I have sought for a perfect solution for a long time and eventually get following old links :

Refer the url :   How to Enable Image Preview to Display Pictures in a Folder