//从网络摘抄
<script language="javascript">
function cc()
{
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart('character',3); //定位到第三个字符
r.collapse(true);
r.select();
}
</script>
<input type=text onfocus=cc() value=sdklfjsldjf>
<script language="javascript">
function cc()
{
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart('character',3); //定位到第三个字符
r.collapse(true);
r.select();
}
</script>
<input type=text onfocus=cc() value=sdklfjsldjf>