I have been creating a form that I want to validate. However if the user clicks on the enter key it submits the form before it is finished. I found a simple jQuery script that does exactly what I need:
I modified this from Code Snippets.
A while ago I discovered that Google offered a tool on Google Code that lets you compress/optimize the code to almost half the size of the original script.
I had always noticed that a lot of libraries such as jQuery, Moo Tools and various plugins have regular and optimized versions. It wasn’t clear to me how this compression was achieved. Then I stumbled upon Closure Tools by Google.
The Closure Compiler compiles JavaScript into compact, high-performance code. The compiler removes dead code and rewrites and minimizes what’s left so that it downloads and runs quickly. It also also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. These checks and optimizations help you write apps that are less buggy and easier to maintain. You can use the compiler with Closure Inspector, a Firebug extension that makes debugging the obfuscated code almost as easy as debugging the human-readable source.
I was able to successfully use the complier to apply simple compression to my code. There is an advance setting, however, my code isn’t good enough for that level of optimization yet. 
You can try the complier yourself at Google Code.
