hightlight

textarea

by Oleh Kotsubko

HTML

<p><textarea name="" id="t" cols="30" rows="10">setSelectionRange 
of NSHTMLTextAreaElement</textarea></p>
<p><button id="b">Select text</button></p>

JavaScript

function notSupported(){ alert('your browser is not supported.'); }

document.getElementById('b').addEventListener("click",function(){
  var f=document.getElementById('t');
  if(f.setSelectionRange){
    f.setSelectionRange(20,-1);
    f.focus();
  } else {
  	notSupported();
  }
});