javascript - onkeypress , onkeyup are not working in textarea. -

<textarea name="textarea" cols="20" rows="5" id="controller-about-information-about" onkeydown="callname1(this.value);" onkeypress="callname1(this.value);" onkeyup="callname1(this.value);"></textarea> <script>     function callname1(str) {         alert(str);         alert("this textarea");      } </script> 

if doing in xhtml document, attribute names have in lowercase (see http://www.w3.org/tr/xhtml1/diffs.html#h-4.2) if want document valid. not sure if makes code "not working".