[SOLVED] Current mouse position and use later

[SOLVED] Current mouse position and use later

<script type="text/javascript">
   $(document).ready(function(e){
      $(document).mousemove(function(e){
         x = e.pageX;
         y = e.pageY;
      });
   })
</script>


With this whenever the mouse moves the x and y are updated with the current position. What I want to do is everytime the mouse moves x+50 or y+50 I want to alert('it works');

Anyone have a good idea on how to go about doing this?
Thanks for your time.
Rob