ID

This following is function:

$('#SomePageElementId').live('vmousedown', function() {
			 //Do something
});

is based on an element ID like this:

<div id="SomePageElementId">
...
</div>

Class

But you can use a class name instead of an ID, with the function instead like this:

$('.SomePageElementClass').live('vmousedown', function() {
			 //Do something
});

based on an element class like this:

<div class="SomePageElementClass SomeOtherClass SomeOtherOtherClass">
...
</div>