Javascript for pipe helper

gistfile1.js

<script type="text/javascript">
function iframeResizePipe()
{
    // What's the page height?
    var height = document.body.scrollHeight;
    // Going to 'pipe' the data to the parent through the helpframe..
    var pipe = document.getElementById('helpframe');
    // Get our current location - staging? production? local?
    var full = location.protocol+'//'+location.hostname+(location.port ? ':'+location.port: '');
    // Cachebuster a precaution here to stop browser caching interfering
    pipe.src =full+'/wp-content/themes/marsdd-test/careers_helper.html?height='+height+'&cacheb='+Math.random();
}
</script>