How to get number of selected options using jquery?
You can use the :selected selector to select them, then get the .length, like this:
var count = $("#mySelect :selected").length;
You can get the number of selected items in the multiselect with the following:
$('#selectList :selected').length
Where #selectList is the id of your .
var n = $("input:checked").length;
see this for more detail:
http://api.jquery.com/checked-selector/
For checkboxes I'm using:
$('input[name="InputName"]:checked').size()