gistfile1.txt

<script type="text/javascript">
$(document).ready(function(){
    $('.jump-to').focus().select();
});
</script>

<form id="edit-jump-to">
       <input type="text" name="jump_to" class="jump-to">
       <input type="submit" value="jump down">
</form>

<script type="text/javascript"> $(document).ready(function(){ $('.jump-to').focus().select(); }); </script>