獲取焦點后光標在字符串后

    <script language=javascript>
    function aft()
    {
    var e = event.srcelement;
    var r =e.createtextrange();
    r.movestart('character',e.value.length);
    r.collapse(true);
    r.select();
    }
    </script>
    <input type=text name=text1 value=字符串之后 onfocus=aft()>
    ---------------------------------------------------------------
    <input onfocus=after2(this) value=在字符串地后門>
    <script language=javascript>
    function after2(obj)
    {
    var rng=obj.createtextrange()
    rng.setendpoint(starttoend, rng);
    rng.select();
    }
    </script>