How to change a <select> value from JavaScript

Answer 1

I think I know what the problem is here - if you are trying to have it select an option that doesn't exist, it won't work. You need to ADD the option first. Like so:

var option=document.createElement("option");
option.text=document.getElementById('other_referee').value
document.getElementById('referee_new').add(option,null);
document.getElementById('referee_new').value = document.getElementById('other_referee').value;

Not elegant, but you get the idea.