I thought the same about checking a checkbox but "checked" is not the right value, you have to use true and false.
So like this: On $(checkbox).attr("checked", true); Off $(checkbox).attr("checked", false); I have no idea why you cant do $(checkbox).attr("checked", "checked"); This also won't work if( $(checkbox).is(":checked") ) { alert("checked"); } Mitch From: jquery-en@googlegroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Ganeshji Marwaha Sent: Sunday, August 05, 2007 1:54 PM To: jquery-en@googlegroups.com Subject: [jQuery] Re: Turning a checkbox on and off To determine if a checkbox is checked, i would use if( $(checkbox).is(":checked") ) { alert("checked"); } To check a checkbox, $(checkbox).attr("checked", "checked"); Both are untested, but let me know how it goes -GTG On 8/5/07, Mitch <[EMAIL PROTECTED]> wrote: How do you check and uncheck a checkbox from jQuery? And how do you determine if a checkbox has been checked or unchecked? I tried attr and css and none of them worked. Thanks Mitch