Is there a way to fire a javascript function on submit without onsubmit()

Question

I am looking to write a javascript function that will fire when a user submits a form, however I do not have edit access to the submit button so that I can add the onsubmit function. I am able to add a <script> tag, so if I can detect the submit, then I can execute my code. Anyone know how to do this?

Answer 1

You can locate the submit button through the DOM (getElementByID() or document.formname come to mind) and then set the submit button's onsubmit value to a function of your choice.

Answer 2

however I do not have programmatic access to the submit button so that I can add the onsubmit function

How is that possible? If you're executing JavaScript on page, you have access to the entire DOM.

Answer 3

You can use the attachEvent or addEventListener to attach an event for an DOM Object.

e.g. element = document.getElementById('submitButtonId'); element.addEventListener('click',doSomething,false);

while "doSomething" is the function name.