Regarding the compatibility issues of juqery radio writing method (old and new versions of jquery)_jquery

As follows:

The above are only suitable Lower versions of IE (IE6 and below)
Higher versions of IE or Firefox need to be changed to
$("input[name='isIel']:checked").val()

Test jquer Version 1.4, 1.3.2

How to obtain radio in old and new versions of juqery
Today I changed to a higher version of jquery and found that the original method that was running normally reported an error. After careful search The method of obtaining radio with jquery is as follows:

New version (currently 1.3.2, 1.4.2):

$("[name='radio_name'] [checked]").val(), or $("input[name='radio_name']:checked").val()

Old version:

$("[@name='radio_name'][checked]").val(), or $("[@name='radio_name']:checked").val()

different The reason is that the old version has an extra @ symbol
PS: When upgrading jquery, it is best to check some information first to improve efficiency.