javascript - remove all of a class in a div -

in outer div want remove classes testclass not working.

http://jsfiddle.net/taczj/

jquery

$('#outer').removeclass('testclass'); 

html

 <span class="testclass">d</span>  <span class="testclass">d</span>  <span class="testclass">d</span>  <span class="testclass">d</span>  <div id="outer">     <span class="testclass">d</span>     <span class="testclass">d</span>     <span class="c">d</span>     <span class="testclass">d</span>     <span class="testclass">d</span>     <span class="testclass">d</span>     <span class="c">d</span>     <span class="testclass">d</span>     <span class="testclass">d</span>     <span class="testclass">d</span> </div> 

css

.testclass{color:red;}  .c{ color:blue;} 

$('#outer > .testclass').removeclass('testclass'); 

you're selecting wrapper div, not children spans class. argue against other answers, since selecting more elements necessary.