beba
<input type=text id='input_' value="xxcxcxcx"/>
<script type="text/javascript">
function func_(oTextArea,nPos)
{
input_.focus();
var rng=input_.createTextRange();
rng.collapse()
rng.moveStart("character",nPos);
rng.select();
}
</script>
<input type="button" value="Кнопка" onclick=' func_(input_,6) ;'/>
P.S. C тя пиво