How to make the copy ok when i uncheck the check box

how to copy some text to the clipboard with jquery or javascript, from google. i know there

is a pludgin named zeroclipboard

zeroclipboard - Provides “Copy to Clipboard” functionality for your web site using JavaScript and Flash - Google Project Hosting

this link is the instructions

can do this and can cross browers. but when i tested it on my site. i set it to copy text optionally . it can’t work.

my test link is Untitled 1

it always copys all the values. even i uncheck some check box. may be the value doesn’t be changed. but when i alter() the variable, the value is ok. how to correct it? thank you.

i want it can copy the checked box value. if the box unchecked, then don’t copy its value.