How to make the screen flash, not working
<pre><code>var flashStep = 1;
function flash() {
 if(flashStep==1) {
 document.bgColor="FFFF00";
 flashStep=2;
 }
 else {
 document.bgColor="FF0000";
 flashStep=1;
 }
}
var task = window.setInterval("flash()",1000);
</code></pre>

<p>This code is supposed to make the screen flash, but does not work at all. <a href="http://jsfiddle.net/phjnM/2/" rel="nofollow">http://jsfiddle.net/phjnM/2/</a>. Why does this not work, it looks flawless to me</p>
