jquery怎么根据后台传过来的值动态设置下拉框、单选框选中

$(function(){
    var sex=$("#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" />女

<input type="hidden" />否

<input type="hidden" >其它</option>
</select>