To prevent users from accidentally submitting your form multiple times you can add a bit of javascript to track if the form has been submitted and prevent further submits. If you are using the jQuery Validate plugin you can do this via submitHandler.
Get URL Query String with JavaScript or jQuery
JavaScript jQuery Purl (JavaScript URL parsing script) To use the Purl method you also need this nifty little script… https://github.com/allmarkedup/purl
Convert Unordered List to Select Navigation with jQuery
If you have an list of links in an unordered list, it’s easy to convert them to a select dropdown with this little chunk of code below. This will allow your navigation to work with or without JavaScript as they will gracefully degrade to an unordered list of links. Add this to your JavaScript file… […]