BlackBerry: [un]checking HTML checkboxes with JS not working

I am trying to check and uncheck an <input type="checkbox" /> by adding and removing the checked="checked" attribute using javascript (jQuery). It works great in Firefox & IE. Adding and removing disabled="disabled" works perfectly. But with checked, neither clearing nor adding the attribute does anything.

I'm writing in XHTML 1.0 Strict--I tried switching everything around to HTML 4.1 and just 开发者_JAVA百科using checked with no equals sign or value, and it still didn't work.

I'm working on Eclipse with the BlackBerry 9000 Simulator 4.6.0.200904091609-212.

Any ideas? A bug? Thanks.

Have you tried setting the DOM object's checked property to false, the old-fashioned way?