How to use specific selectors on $(this)

I'm trying to find out how to check if a checkbox is checked or not.

I know about the :checked selector but I'm trying to do this using the $(this) object.

$(".permission_checkbox").live('change',function(){
    if($(this+":checked").length==0){
        a开发者_运维问答lert('remove');
    } else {
        alert('add');
    }
});

This code always calls alert('add')!

Thanks for any help & merry christmas

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While you asked about using selectors, you really don't need jQuery for this.

Checkboxes have a checked property you can access directly, which will be much faster than adding the overhead of jQuery object creation + method call + selector engine.

if( this.checked ) {
    // it was checked
}

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Try jQuery.is:

$(this).is(":checked")

Hope it helps

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Try this to select the checked input.

$(this).is(':checked')

hope it will help..

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What about

$(this).find(':checked')

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Instead of + you should use shortcut for find $(":checked", this)