[jQuery] Easy SELECT question for newbie

I am an extreme beginner so sorry for the basic question.

I have a number of checkboxes on the screen that contain
an "ID" with the characters "ckKyW" in it.
Checkbox Examples:
whatever_ckKyW34
whatnow_ckKyW67
whoops_ckKyW23

I have tried every combination that I could think of
(a few of them are below) but I am not able to retrieve
only these checkboxes. #1 below retrieves ALL checkboxes
but I know there is a way to retrieve only the ones I need.

Can some help me please.

Thanks,
gBerger

#1
This works [ and I was proud of myself for getting this far :) ]
// var sChkBoxes = $("form :checkbox").each(function()
// {
// alert(this.id);
// }
// );

#2
// NO ERROR JUST DOESNT RETURN ANYTHING
// var s3 = "";
// $("form :checkbox").find("a[@id*='ckKyW']").each(function()
// {
// alert(this.id);
// }
// );

#3
// ERRORS
// $("[@id*='ckKyW']").each(function() {
// alert(this.id);
// }
// );
// $("a[@id*='ckKyW']").each(function() {
// alert(this.id);
// }
// );