用JavaScript设置输入光标的位置(兼容多浏览器)

<script language="javascript">  
function setPos(e)  
{  
var txt=document.getElementById("text1");  
txt.focus();
if (document.selection)  
{   
    //IE  
    var tmpRange = txt.createTextRange();  
    tmpRange.move("character",e.selectedIndex);  
    tmpRange.collapse(true);  
    tmpRange.select();   
    }  
    else  
    {  
        //FireFox,Chrome  
        txt.selectionStart=e.selectedIndex;  
        txt.selectionEnd=e.selectedIndex;  
    }  
}  
</script>  
<input type="text" name="text1" id="text1" value="1234567">  
<select onchange="setPos(this)">  
<option value="0">0</option>  
<option value="1">1</option>  
<option value="2">2</option>  
<option value="3">3</option>  
<option value="4">4</option>  
<option value="5">5</option>  
<option value="6">6</option>  
<option value="7">7</option>  
</select>