Assigning more than one class for one event

Approach #1

function doSomething(){
    if ($(this).hasClass('clickedTag')){
        // code here
    }
    else {
         // and here
    }
}

$('.tag1').click(doSomething);
$('.tag2').click(doSomething);

// or, simplifying further
$(".tag1, .tag2").click(doSomething);

Approach #2

This will also work:

?$(".tag1, .tag2").click(function(){
   alert("clicked");    
});?

Fiddle

I prefer a separate function (approach #1) if there is a chance that logic will be reused.

See also How can I select an element with multiple classes? for handling multiple classes on the same item.