Javascript Jumps out of Frames

I'm attempting to load a page in a frameset, but it has

<script language='JavaScript'>
<!--
if (parent.frames.length > 0) 
    parent.location.href = location.href;
-->
</script>

and pops out of the frames each time.

I want to only block those lines of javascript on the site, and I only need to from this one browser. I tried looking for a greasemonkey script to base my script off of, but I've discovered that I don't know jack shit about javascript. It's all greek to me.

Any javascript people care to reveal the secret to me?

>>10
Why?