N.P.
After looking up a javascript void error message I found this potential solution:
http://www.tech-faq.com/javascript-void-0.shtml
It sounds as though your javascript is disabled. You have to enable it, in case it is disabled.
For Mozilla Firefox
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To turn on JavaScript is FireFox 3.0, follow the procedures given below.
1. Start your browser
2. Select Tools-->Options
3. From the "options" dialog box that appears, select the "Content" Tab.
4. Click on the "Enable JavaScript" checkbox.
5. Click OK.
For Internet Explorer
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1. Select Tools->Internet Options
2. From the "Internet Options" dialog box that appears, Click on the "Security" tab.
3.Click on the "Custom Level" Button present at the bottom of the dialog box.
4. The "Security Settings" dialog box appears.
5. Scroll through the dialog box and find "Scripting"->"Active Scripting" and click on the "Enable" radio button.
Opera
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1. Select File==>Preferences
2. On the left side of the window, select "Multimedia".
3. Enable the "JavaScript" Checkbox.
4. Press the OK Button.
5. Restart the browser.
and presto!! JavaScript is enabled in your browser.