Change input field onkeyup

[Guest FirefoxRocks]

Doesn't work for me. Maybe I have a wrong function?

<script type="text/javascript">function change(){var c=document.getElementById("pages").value/3;document.getElementById.("credits").value=Math.round(c)}</script>

The input buttons:

<td><input type="text" size="2" maxlength="2" id="pages" name="pages" onkeydown="change()" />|--> It will cost you  <input type="text" size="2" maxlength="2" id="credits" name="credits" /> credits.</td>

I tried putting the onkeydown="change()" into different input also and tried a different event. No luck. Help is needed :|

[pulpfiction]

Remove period [.] from below statement...document.getElementById.("credits").value=Math.round©

[pulpfiction]

If you are using onkeydown event, then the first time when a number is pressed, the value in textbox is null. instead use onkeyup event. try code below.

<script type="text/javascript">function change(num){var c;c=num/3;document.getElementById("credits").value=Math.round(c)}</script><input type="text" size="2" maxlength="2" id="pages" name="pages" onkeyup="change(this.value)" />|--> It will cost you <input type="text" size="2" maxlength="2" id="credits" name="credits" />

[Guest FirefoxRocks]

If you are using onkeydown event, then the first time when a number is pressed, the value in textbox is null. instead use onkeyup event. try code below.

<script type="text/javascript">function change(num){var c;c=num/3;document.getElementById("credits").value=Math.round(c)}</script><input type="text" size="2" maxlength="2" id="pages" name="pages" onkeyup="change(this.value)" />|--> It will cost you <input type="text" size="2" maxlength="2" id="credits" name="credits" />

It works! Thank you very much! As you can see, I'm not good at JavaScript