How to implement smart navigation in JSF or JSP

hi,dear all:
we design a jsp page with tiles,everything is ok.
But we got a problem: when we design many input text or radio button or listbox on our page1.jsf,it will reload to itself when it got error with the component that user keyin and render the page on the top place.
we want user will see the place that he keyin error (droll automatic) not the top of the page.
we see that already done by asp.net's "smart navigation",but we must write in jsf.
How to do that next step? thank you very much.

Hi Dan,
Here is some key listner code that makes sure the user only enters numbers. Maybe you can change it for the return button (I think the charCode of the return button is 10, btw)
<script type="text/javascript">
function checkIt(evt)
     var charCode = (evt.charCode) ? evt.charCode : ((evt.which) ? evt.which : evt.keyCode);
     if (charCode > 31 && (charCode < 48 || charCode > 57))
          alert("Please make sure entries are numbers only.");
          return false;
          return true;
</script>And in the h:inputText I have onkeypress="return checkIt(event)"
Cheers,
Illu

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