JS字符串类型转日期然后进行日期比较

1、字符串转日期格式

var stringToDate = function(dateStr,separator){
    if(!separator){
        separator="-";
    }
    var dateArr = dateStr.split(separator);
    var year = parseInt(dateArr[0]);
    var month;
    //处理月份为04这样的情况
    if(dateArr[1].indexOf("0") == 0){
        month = parseInt(dateArr[1].substring(1));
    }else{
         month = parseInt(dateArr[1]);
    }
    var day = parseInt(dateArr[2]);
    var date = new Date(year,month -1,day);
    return date;
} 

日期比较

var dateFeedBack = stringToDate(gfeedbackDataStore.getRowSet().getRow(0).getItemValue("svfd_FEEBBACK_DATE"));
    var dateNow = stringToDate(callback_date);
    var days1 = parseInt(dateFeedBack.getTime()/(1000*60*60*24));
    var days2 = parseInt(dateNow.getTime()/(1000*60*60*24));
    if((days2-days1)>7){
      alert("提示：总部确认日期7天内才可退单！");
      return;
    }