function chooseOne(chk){ //First get the collection object of chekcBox with the same name var obj = document.getElementsByName("chk"); for (i=0; i//Judge Whether the i element in the obj collection is cb, if not it means it has not been selected if (obj[i]!=chk) obj[i].checked = false; //To check at least one If so, remove the else line above and replace it with the following line else obj[i].checked = true; } }
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