Help with Javascript

First thanks with the help I got yesterday with php and javascript problem, I have a problem with javascript and I need to know if anyone know of a javascript mailing like this, so some strange reason if I add the tag taget to this line... <a href="javascript:gotoAd()" target="_top"> Any of my browser give me an error, but it I remove it work, but it's lost due to frames. I know this is a php question so if you can give me a javascript mailing that would be a BIG help. Payne