如何选中textarea中指定文字

Question

选中 textarea中指定文字<textarea cols="40" rows="10" id="target">
<div>php
<div>qqq</div>
</textarea>怎么让 <div>php</div>
是选中状态注:textarea 中可以看到 div标记

Answer 1

<script>
function foo(){
   var textbox=  document.getElementById('target');
   selectText(textbox,0,14);
}
function selectText(textbox,startIndex,stopIndex){
     if(textbox.setSelectionRange){
       textbox.setSelectionRange(startIndex,stopIndex); 
 }else if(textbox.createTextRange){
     var range=textbox.createTextRange();
 range.collapse(true);
 range.moveStart('character',startIndex);
 range.moveEnd('character',stopIndex-startIndex);
 range.select();
 }
 textbox.focus();
}
</script>
<textarea cols="40" rows="10" id="target">
<div>php</div>
<div>qqq</div>
</textarea>
<input type="button" onclick="foo()" value="Click">