Question: How do I prevent this JavaScript function from executing.

I have a js function that is causing a serious issue and I am not able to remove nor modify it source. I would like to know if it is possible to simply prevent, stop, or kill the function in order that it is not executed till I resolve the issue.

So somewhere inside the page:

```
<script type="text/javascript"><!--
problem_func();
//--></script>

```

And all I want is to stop that function from execution placing a stopper inside the header or external js.

Any advice?

**HERE IS THE LIVE EXAMPLE, HOW TO STOP THAT? <http://jsbin.com/uxalag/3>**

Answer: 
If you know the function name, you can replace it with a function that does nothing.
After the script tag of the source js file use this:

```
window.FunctionName=function(){return false;};

```
Just overwrite it

for example if a `function abc() { ..... }` causing you problem you can overwrite it with an empty body.

```
function abc() {  }

```