Solution for Net-Force.nl : Level 104 - Escape now!!!

Today, the solution will be on solving Level 104 from Net-Force.nl

The link to the original challenge: http://www.net-force.nl/challenge/level104/

After accessing the above link, the only hints given to us are:

Yet another javascript protection....

Again, let's take a quick view of the page's source code and we are able to see the following source code.

<script type="text/javascript">
<!--
document.write(unescape("%3Cform%3E%0D%0A%3Cp%3EUsername%3A%20%3Cbr%3E%0D%0A%20%20%3Cinput%20type%3D%22text%22%20name%3D%22text2%22%3E%0D%0A%3C/p%3E%0D%0A%3Cp%3EPassword%3A%20%3Cbr%3E%0D%0A%3Cinput%20type%3D%22password%22%20name%3D%22text1%22%3E%3Cbr%3E%0D%0A%20%20%3Cinput%20type%3D%22button%22%20value%3D%22Check%21%22%20name%3D%22Submit%22%20onclick%3Djavascript%3Avalidate%28text2.value%2C%22user%22%2Ctext1.value%2C%22member%22%29%20%3E%0D%0A%3C/p%3E%0D%0A%0D%0A%3C/form%3E%0D%0A%3Cscript%20language%20%3D%20%22javascript%22%3E%0D%0A%0D%0Afunction%20validate%28text1%2Ctext2%2Ctext3%2Ctext4%29%0D%0A%7B%0D%0A%20if%20%28text1%3D%3Dtext2%20%26%26%20text3%3D%3Dtext4%29%0D%0A%20alert%28%22Well%20done%20use%20this%20password%20on%20the%20challenge%20page%22%29%3B%0D%0A%20else%20%0D%0A%20%7B%0D%0A%20%20alert%28%22Wrong...%21%22%29%3B%0D%0A%20%7D%0D%0A%7D%0D%0A%0D%0A%3C/script%3E"));
//-->
</script>

Hmmm...seems like an encoded string.
Maybe let's try saving this entire page and replacing document.write with alert
You should be able to see the following image once you run it with your browser.

As we can see from this decoded source code that it's comparing user's input for username and password with "user" & "member" respectively.

Using member as the key to this challenge, we solved this easily. :D

Cheers

0x4A61636F62