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<script>
function checkradio（o,x）{
document.getElementsByName（"inptB"）[x-1].checked=o.checked
}
</script>
<input name="inptA" type="radio" id="inptA" onclick="checkradio（this,1）">aaa
<input name="inptA" type="radio" id="inptA" onclick="checkradio（this,2）">bbb
<input name="inptA" type="radio" id="inptA" onclick="checkradio（this,3）">ccc
<br>
<input name="inptB" type="radio" id="inptB">111
<input name="inptB" type="radio" id="inptB">222
<input name="inptB" type="radio" id="inptB">333