juery 选择器 选择多个元素

//处理点击“物品来源”和“邮寄状态”事件
$("#goodSource,#mailState").change(function(){
    var goodSourceId = $("#goodSource").children(‘option:selected‘).val();
    alert($("#mailState").children(‘option:selected‘).val());
    if (goodSourceId == 0) { //选择全部显示
        renewPage(mailInfo);
        return;
    }
    var tmp = new Array();
    for(var i=0,j=0;i<mailInfo.length;i++) {
        if (!(mailInfo instanceof Array) ) {
            break;
        }
        if (mailInfo[i].goodSource == goodSourceId) {
            tmp[j++] = mailInfo[i];
        }
    }
    renewPage(tmp);
})