Hi Faysal,
The "Microsoft Visual Studio Express 2012 for Windows 8" is used for developing windows store apps on Windows 8 system.
http://www.microsoft.com/en-us/download/details.aspx?id=30664
While the "Microsoft Visual Studio Express 2012 for Windows Desktop" allow you to develop traditional desktop applications like winform, WPF applications.
http://www.microsoft.com/en-us/download/details.aspx?id=34673
If you want to use HTML/javascript/css in your desktop application(such as a WPF application), you can consider using a webbrowser control in your WPF form and load the certain html page in the webbrowser control (which can enable scripting). For detailed
info on how to integrate webbrowser control in WPF app (so as to display HTML based UI), you can post the question in the WPF forum:
http://social.msdn.microsoft.com/Forums/en/wpf/threads
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