jquery 增加,删除样式

$("#" + this.messageContainerId + " tr[id^='"+this.messageContainerId+"summary-']").removeAttr("style");
    for (var i = 0, len = data.length; i < len; i++) {
        $("#" + this.messageContainerId + "summary-"+data[i]+"").css("background-color","#CFCFCF");
    }