JS设置光标选中text中指定文字-CFANZ编程社区

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

 <html xmlns="
http://www.w3.org/1999/xhtml">

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

 <title>无标题文档</title>

 <script type="text/javascript">

 var setCursorPos = function(el, pos){

     if(el.createTextRange){

         var rng = el.createTextRange(); //新建textRange对象   

         rng.moveStart('character', pos); //更改rng对象的开始位置   

         rng.collapse(true); //光标移动到范围结尾   

         rng.select();//选中   

         el.focus();

     }else if(el.setSelectionRange){

         el.focus();  //先聚集 

         el.setSelectionRange( pos ,  pos );  //设光标 

     }

 }

 </script>

 </head>

 <body>

 <input type="text" id="aaa" value="abcdefghijk123456789"/><input type="button" value="test" οnclick="setCursorPos(document.getElementById('aaa'),10);"/>

 </body>

 </html>