Question

i want usually when the user manually checks all the checkboxes, the checkall checkbox should become checked, and when user unchecks one box so that “all” aren’t checked, the checkall box should become unchecked. how is it in my code?

EXAMPLE: here is full my code

Answer 1

Here you go

http://jsfiddle.net/cQYVE/13/

Just add the below code in the tr click handler in your code.

$('.table_show tr input:first').prop('checked', 
     shouldCheck && ($('.table_show tr:gt(0) input:not(:checked)').length == 0));