Check whether link's text is "B" then remove its class?

I want to check whether an a node contains开发者_JS百科 the word "B". If so, the node's someclass class should be removed.

For example:

<a href="http://link.com" class="someclass">B</a>

---

$("a:contains('B')").removeClass('someclass');

---

$('a').click(function(){

   var text = $(this).text();

   if(text.indexOf("B")>= 0 ) {

         $(this).removClass('someclass');
   }

});