jQuery: Checking a Radio Button with attr() doesn't work? -

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not sure if bug in jquery 1.4.2 - can't figure out why won't work.

i need check radio button. i'm using attr({'checked':'checked'}), tried attr('checked':true) - none work. if attr('title':'whatever') on same radio button, no other change anyhwere, work everytime.

is there obscure difference between title attribute , checked attribute i'm missing? both everyday html attributes. why 1 work , other 1 doesn't?

here's code:

$('.formradiodiv').live('click', function() {       //remove checked radio btns       $('input', $(this).parents('#radiogroup')).each(function() {             $(this).removeattr('checked');    });       $('input', $(this)).attr('checked', true); });

edit: alright, believe got it. apparently worked along, , head temporarily being in tukka tukka land or something.

i checking source code see if jquery had added "checked" attr radio button clicking on: in firefox, highlight content, right click > view selection source. doing shows changes dom done javascript, , expecting see attribute in source code.

all time, html radio button hidden via css. that's reason need in first place - i'm replacing default radio button image.

so in source code, didn't see checked attribute on radio button, hence assumed jquery not working correctly. removed css rule, , showed buttons testing, saw checked correctly. nuff said.

thank commented. i'll vote y'all up. cheers

jab in dark: suspect $('input', $(this)) matches other types of <input> elements besides check boxes, , goes wrong when setting checked attribute of elements.

try restrict selector check boxes (also note don't need wrap this when using selector context):

$("input:checkbox", this).attr("checked", "checked");

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