JavaScript code to position the cursor on a certain line of textarea_form effects

   
  aaaaaaaaaaaaaa   

  cccccccccc   
  dddddddddddd   
  fffffffffffff   
     
     
     
  <script>    <br>  function   goL(Line)    <br>  {    <br>  ta1.focus();    <br>  var   v=ta1.value.split('n');    <br>  ch=0;    <br>  for(var   i=0;i<Line-1;i )    <BR>    ch =v[i].length;    <BR>  var   o=ta1.createTextRange();    <BR>  o.move("character",ch);    <BR>  o.select();    <BR>  }    <BR>  </script>

<textarea name="ta1" rows="5" cols="50"> aaaaaaaaaaaaaa bbbbbbbbbbbbbb cccccccccc dddddddddddd fffffffffffff <input value="1" name="line"> <input type="button" onclick="goL(parseInt(line.value));" value="go">
[Ctrl A 全选 注:如需引入外部Js需刷新才能执行

]<script> function goL(Line) { ta1.focus(); var v=ta1.value.split('\n'); ch=0; for(var i=0;i<Line-1;i++) ch+=v[i].length; var o=ta1.createTextRange(); o.move("character",ch); o.select(); } </script>