Disable page scroll until page loads - JQuery
<p>I have built a parallax scrolling intro for a clients website - the site contains many high res images - so I have created a quick loader which blanks out the screen with a full screen high z-index div and then uses the setTimeout method to fade in the page 4 seconds after document ready (not sure if this is the best way to do this but it works in every test I've tried).</p>

<p>I would like to disable the scroll to prevent users scrolling through the animation before it appears -can anyone recommend a good cross-browser method to do this? </p>
