test.htm

<!doctype:html>
  <style>
   #target {
     background-color: #800;
     display: inline-block;
     position: absolute;
     padding: 0.5em;
     border-radius: 0.3em;
     color: #fff;
     }
  </style>

  <span id="target">Try to click me!</span>

  <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
  <script>
   $("#target").on("mouseover", function(){
     // Move the target out of the way, heehee
     $("#target").animate({
       top: 500*Math.random(),
       left: 500*Math.random()
       }, 300);
   });

  </script>