radio控件name相同选出等于指定的value然后选中

function Checked() {
var count = $("#hfQuestionCount").val();
for (var i = 0; i < count; i++) {
var questionid = $("#hfQuestionID" + i + "").val();
var obj = $(":radio[name='rad" + questionid + "']");
for (j = 0; j < obj.length; j++) {
if (obj[j].value == "True") {
obj[j].checked = true;
}
}
}
}