Count characters in a textbox using Javascript

Posted on By David Kittell 
<script type="text/javascript">
function countChars(countfrom,displayto) {
  var len = document.getElementById(countfrom).value.length;
  document.getElementById(displayto).innerHTML = len;
}
</script>
<textarea id="data" cols="40" rows="5" onkeyup="countChars('data','charcount');" onkeydown="countChars('data','charcount');" onmouseout="countChars('data','charcount');"></textarea><br>
<span id="charcount">0</span> characters entered.
Originally Posted on July 15, 2013
Last Updated on October 26, 2015
All information on this site is shared with the intention to help. Before any source code or program is ran on a production (non-development) system it is suggested you test it and fully understand what it is doing not just what it appears it is doing. I accept no responsibility for any damage you may do with this code.
Code JavaScript

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