Unable to clear a TextBox using javascript
<p>I'm unable to clear the text box when I hit the button with value <code>C</code>.</p>

<p>In Opera when I press the number buttons it properly inputs them into the text box but for some reason the <code>C</code> button never works! Here is the <a href="http://jsfiddle.net/pwQpV/9/" rel="nofollow">jsfiddle</a>.</p>

<p>Thanks.</p>

<p><hr>
<em>Edit:</em> I haven't implemented all the functionality yet! Only the number buttons work.</p>
