greasemonkey script to select radio button

Question

i\'m new here. i\'ve a question related to greasemonkey.

A page contain multiple radio buttoned values and one choice is to made, this correct choice option is hidden

Answer 1

There are some ways you can use:

1 You can pre-select it by putting in selected="selected" like this:

 abcd

2 You can use jQuery to do it easily (I don't know whether it will be applicable in terms of greasmonky though)

$(function(){
  $('input[value="abcd"]').attr('checked', 'checked');
});

3 You can loop through all elements and selected the one with raw javascript

var form = document.getElementById('bloogs');

for(var i=0; i

Update:

This uses jquery and selects a radio after reading the value from hidden field:

$(function(){
  $('input[value="' + $('#hidden_field_id').val() + '"]').attr('checked', 'checked');
});

Or with raw javascript:

var form = document.getElementById('bloogs');
var hidden_value = document.getElementById('hidden_field_id').value;

for(var i=0; i

Update 2:

As per the name, here is how you can go about:

$(function(){
  $('input[value="' + $('input[name="ans"]').val() + '"]').attr('checked', 'checked');
});