How do I extend this javascript to change the class of two elements in one onclick?

Cletus helped my with this really sweet code yesterday: what javascript object am I looking for? click a button-it stays bold till the next one is clicked?

This takes the class of my li and changes the class. It works great! I'm wanting to extend this so it will also change the class within the a in the li. How do I do that?

Example:

<ul>
 <li class="old_class"><a class="old_class" ...>
 <li class="old_class"><a class="old_class" ...>
 <li class="old_class"><a class="old_class" ...>
</ul>

So when I click the first link it would become:

<ul>
 <li class="new_class"><a class="new_class" ...>
 &开发者_运维知识库lt;li class="old_class"><a class="old_class" ...>
 <li class="old_class"><a class="old_class" ...>
</ul>

As the code is now, the li class changes, but not the a.

The code I'm using:

$(".old_class").click(function() {
  $(".new_class").removeClass("new_class");
  $(this).addClass("new");
});

Thank you! I'm using Jquery...

Define you ul with a class, say <ul class="nav">...

Then:

var navItems = $('.nav > li');
navItems.click (function () {
    navItems.children ('a').andSelf ()
        .removeClass ('new_class').addCass ('old_class');
    $(this).children ('a').andSelf ()
        .removeClass ('old_class').addClass ('new_class');
});

That said, you don't need any class in the children a - you could refer to them in CSS as simply .new_class a

Try:

$(".old_class").click(function() {
  $(this).removeClass("old_class");
  $(this).children("a").removeClass("old_class");
  $(this).addClass("new_class");
  $(this).children("a").addClass("new_class");
});