How can I unobtrusively disable submit buttons with Javascript and Prototype?

Question

So I found this recommendation, but I can\'t quite seem to figure out how.

This is the code I originally started with:

   function greySubmits(e) {
              


        

Answer 1

document.observe("dom:loaded", function(){
   $$('form').find(function(thisForm) {
      Event.observe(thisForm, 'submit', function(event) {
         $$('input[type="submit"]').find(function(input) {
            input.value = 'Please wait ...';
            input.setAttribute('disabled',true);
            });
         });
      });       
   });