Unbind .onselectstart return false

I am trying to write a userscript that will remove the effects of onselectstart from an id on a page.

So far I am assuming that I can rebind the original function using something like this:

document.getElementById('nodrag').onselectstart = function() { /* code original action */ };

JSFiddle

Any ideas would be appreciated.

Answer

Looks like I managed to work out the answer. Thank you LightStyle for giving me the hints.

So I create an script tag with document.getElementById('nodrag').onselectstart = function() { }; inside it and append this to the body.

// Create the script to remove the nodrag from chrome
var script = document.createElement('script');
script.type='text/javascript';
script.innerHTML = "document.getElementById('nodrag').onselectstart = function() {  };";
var body = document.getElementsByTagName('body')[0];
body.appendChild(script);

This might not work in traditional contexts however works a charm on a userscript. Here is the final script:

https://gist.github.com/lgoldstien/5928021