Эдди,
jQuery
<script type="text/javascript" src="http://yandex.st/jquery/1.4.4/jquery.min.js"></script>
<input id=InpFrm1 type=text name=InpFrm2 autocomplete="off"/>
<input id=InpFrm2 type=text name=InpFrm2 autocomplete="off"/>
<script>
var a,L,epl=$("#InpFrm1");
function epl3(){a=epl.val();$("#InpFrm2").val(a)};epl3();
$("#InpFrm1").click(function (){setTimeout('epl3()',100)});
epl.bind('mouseout mousemove keydown keypress keyup',function(e){epl3()});
</script>