HTML coding to open link in new window

Hi

I am currently trying to add a link in the side bar.

I have used ethe Custom HTML widget.

I enter the coding below:

<a href="http://www.ajavachatsite.com" target="_blank">CHAT</a>

I click save, go to check it and it opens up in the forum page replacing the forum.

I go back into the settings and it has changed to:

<a href="http://www.ajavachatsite.com" rel="nofollow" class="external">CHAT</a>

Any ideas how I can provide a link for a java chat that will open a new window?? 

I have read the tutorial for the chatango but have a picky bunch that don't like chatango.

lefora does not java for security reasons, but there are other flash chat apps if you don't like chatango, you can try the meebo me widget available from www.meebo.com

Ok no worries. 

Thanks for the reply