How to disable submit button once it has been clicked?

Question

I have a submit button at the end of the form.

I have added the following condition to the submit button:

onClick=\"this.disabled=true;
this.value=\'         


        

Answer 1

function xxxx() {
// submit or validate here , disable after that using below
  document.getElementById('buttonId').disabled = 'disabled';
  document.getElementById('buttonId').disabled = '';
}