The tips.js file exists, but it's not turning up in the developer list of scripts once the page loads, so there must be something about the content of the tips.js file that is not allowing it to be included.
Another issue that's getting in the way is this part:
where jquery.gchart.js.js should be jquery.gchart.js
Since tips.js uses gchart, that looks to be a good place to start correcting things.
After that, you can run tips.js through a simple grammar checker, like the online lint which will show you very obvious problems that should be resolved.
You don't need to run your code through a much tougher linting process such as jslint.com with "The Good Parts" enabled. That's only for bad-asses who really care that their code is as clean as it can possibly be.
That online lint should be enough to help you take care of the the most major significant problems.