title: jquery animate position in percentage
body: <p>how do I determine the positions in percentages?   </p>
  
  <pre><code>    $(document).ready(function(){
        $("#button").toggle(function(){
          $("#slide").animate({top:-100%},1000);
        },function(){
          $("#slide").animate({top:0%},1000);
        });
      });
  </code></pre>
  
  <p>Please suggest.</p>