this.form.submit();

or

document.forms[ myFormName ].submit();

and it gives you a nasty error like

submit is not a function

don’t despair, just:

• look at the HTML source code:

  <input id="submit" name="submit" value="Send to developer" type="submit"  />
  

• change the name of the button to something else, like:

  <input id="mySubmitButton" name="mySubmitButton" value="Send to developer" type="submit" />
  

That’s all!

Now the explanation: the browser confuses your submit(); call with the button object, which has no such action.

The browser acted just like you were explicitly calling

button = document.getElementById( 'submit' );
button.submit();

There are two ways of using this excellent codebase:

• grab all the available PHP.JS functions and use them as you need them
• take each function you really need and put it into your JS codebase for the project

The advantage of the second method is that you don’t have code you don’t need included all over the place, but it also means you will search each time the codebase to discover the code you need. Meanwhile, the first solution seems appropriate for the ones in a hurry, you just try to use one function like you’re accustomed in PHP and it’s there already included, you’re developing fast and safe, with just a small performance issue you can always address later.

Let’s say you’ve using the long2ip and ip2long PHP functions for storing IPs as numbers, and have a strong preference for using them for performance reasons, as all your IPs are stored as numbers in the database. What if you need similar functionality in JavaScript? Well, just take the code you need and use it! It’s that simple