I have 2 divs:
<div id="container1"><input class="1"><input class="2"></div> <div id="container2"><input class="1"><input class="1"><input class="2"></div>
Now, how to remove all class = "1", but only from container2.
That should do it.
$('#container2 .1').remove();
This searches for all descendants from the element with id "container2" that belongs to the class named "1" and then removes them from the DOM.