<textarea id=demo>abcdef</textarea>
<input type=button onclick=check(demo) value=textarea>
<script>
function check(obj){
obj.focus();
var rng=document.selection.createRange();
rng.moveEnd("character",1);
if(rng.htmlText==rng.text)
alert("文本之间")
else
alert("文本最后")
}
</script>
<input type=button onclick=check(demo) value=textarea>
<script>
function check(obj){
obj.focus();
var rng=document.selection.createRange();
rng.moveEnd("character",1);
if(rng.htmlText==rng.text)
alert("文本之间")
else
alert("文本最后")
}
</script>
<input type="button" value="get caret position" onclick="getCaretPos(txt1)">
<script language="javascript">
function getCaretPos(obj)
{
obj.focus();
var currentRange=document.selection.createRange();
var workRange=currentRange.duplicate();
obj.select();
var allRange=document.selection.createRange(); var len=0;
while(workRange.compareEndPoints("StartToStart",allRange)>0)
{
workRange.moveStart("character",-1);
len++;
} currentRange.select() alert(len);
if (len >= obj.value.length)
alert("at the end");
else if (len == 0)
alert("at the start");
else
alert("in the middle");
}
</script>
<input type="button" value="get caret position" onclick="getCaretPos(txt1)">
<script language="javascript">
function getCaretPos(obj){
obj.focus();
var workRange=document.selection.createRange();
var allRange=obj.createTextRange();
workRange.setEndPoint("StartToStart",allRange);
len=workRange.text.length;
if (len >= obj.value.length)
alert("at the end");
else if (len == 0)
alert("at the start");
else
alert("in the middle");
}
</script>