jquery怎麼根據後臺傳過來的值動態設置下拉框、單選框選中

$(function(){
    var sex=$("#sex").val();
    var marriageStatus=$("#marriageStatus").val();
    var education=$("#education").val();
    if(!isnull(sex)){
        $("input:radio[name='sex'][value="+sex+"]").attr('checked','true');
    }
    if(!isnull(marriageStatus)){
        $("input:radio[name='marriageStatus'][value="+marriageStatus+"]").attr('checked','true');
    }
    if(!isnull(education)){
        $("#education1 option[value='"+education+"']").attr("selected", true);
    }
});

<input type="hidden" id="sex" value="${serviceInfo.sex}"/>
<input type="radio" name="sex" value="0" checked="checked"/>男
<input type="radio" name="sex" value="1"/>女

<input type="hidden" id="marriageStatus" value="${serviceInfo.marriageStatus}"/>
<input type="radio" name="marriageStatus" value="0" checked="checked"/>是
<input type="radio" name="marriageStatus" value="1"/>否

<input type="hidden" id="education" value="${serviceInfo.education}"/><select name="education" id="education1">    <option value="碩士">碩士</option>    <option value="本科">本科</option>    <option value="大專">大專</option>    <option value="其它">其它</option></select>