How do i input a search word via a user PROMPT INPUT BOX ?

[dzur531]

<script> $(document).load(function () { $('.string-example').highlightWithinTextarea('Acc'); }); </script>
This is done via scripting... the search term word to be hightlighted is: 'Acc'
How do I enter a search term to be highlighted via a USER PROMPT Input box ?
Please Assist.
Thank You.