window.onload in jQuery
<p>I have use the example of sizzle and there I got window.onload in the last of the code. </p>

<p>What does this means.</p>

<p>My code is like this:</p>

<pre><code>  var init = function() {
    var trail = Sizzle;
    var foo = trail('.foo');
    foo[0].onmouseover = function() {
      this.style.backgroundColor = (this.style.backgroundColor.indexOf('blue') === 0) ? 'yellow' : 'blue';
    };
    foo[1].onmouseover = function(){
      this.style.backgroundColor = ( this.style.backgroundColor.indexOf('red') === 0) ? 'yellow' : 'red' ;
      jQuery(foo[1]).after("&lt;b&gt;Hello&lt;/b&gt;");
    }
    foo[2].onmouseover = function(){
      this.style.backgroundColor = ( this.style.backgroundColor.indexOf('green') === 0) ? 'yellow' : 'green' ;
    jQuery(foo[3]).toggle("slow");
    jQuery('b').remove();
    }
  };
  window.onload = init;
</code></pre>

<p>What does this mean?</p>
