Ie 和 Firefox 下取得textarea 和 input.text的光标位置
<body>
<script language="JavaScript">
function getCursorPos(event)
{
var obj= event.target||event.srcElement;
if(document.selection){
if(obj.tagName!=undefined&&obj.tagName=='INPUT'){
var s=document.selection.createRange();
s.setEndPoint("StartToStart",obj.createTextRange());
var pos=s.text.length;
}else{
var rng = obj.createTextRange();
rng.moveToPoint(event.x,event.y);
rng.moveStart("character",-obj.value.length);
var pos=rng.text.length ;
}
}else{
var pos=obj.selectionStart;
}
document.getElementById('dbg').innerHTML="位置："+pos;
}
</script>
<form name="form1" method="post">
<textarea name="username1" type="text" id="username1" onClick="getCursorPos(event)">1234567890</textarea>
<inPut name="username" type="text" id="username" value="123456789" onClick="getCursorPos(event)">
</form>
<div id="dbg"></div>
</body>
