If  you wanna see your webpage source using javascript here is  a simple example just copy and paste the script below to your webpage and press the View Source button.

<form action="#" onsubmit="return getsource();">
<input type="submit" value="View Source!" />
</form>

<script type="text/javascript" >
function getsource()

{
 var thesource= "view-source:" + window.location;
 window.open(thesource, 'source_code', 'width=400, height=400, resizable=1, scrollbars=1');
 return false;
}</script>

This script will work on Mozilla and Chrome. IE hate this script  

Related posts:

1. Displaying Text from User On Your Webpage
2. Password protect pages using javascript
3. Add to favorites or bookmarking using javascript in firefox and internet explore [IE]
4. Words Validation with Javascript
5. Disabling right click menu using javascript Enhanced Version
6. PHP is not executed and source visible
7. How to close a child window from a parent window using javascript