SOURCE

var util = {
  falls : function() {
      var funs = arguments;
      obj.setTimeout(function(){
          // 支持直接数组.
          if(funs[0] && (typeof funs[0] != "function") ){
              funs = funs[0];
          }
          var lth = funs.length;
          var f1 = funs[0];
          var fend = funs[lth-1];

          var i = 0;
          var fnext = function(err) {
              if(err) {
                  fend(err);
                  return;
              }
              i++;
              i < lth ? funs[i](i==lth-1?null:fnext) : 0;
          };
          if(f1==fend){
              return f1();
          }
          obj.setTimeout(function(){
              f1(fnext);
          },0);
      },0)
  },
}

//调用示例：
util.falls(
    function(next){
        data.permission = rest.getPermissionShow(data.caseId);
        if(!data.permission.show){
            return next({code:-1,message:"无权限"});
        }
        next();
    },
    function(next){
        rest.findCaseCxPayInfoTotalByCaseId({
            caseId : data.caseId
        }, function(res){
            data.fmdata = util.copy(res.data||{})
            next();
        }, function(){}, function(res, berr){
            berr?next({code:-1,message:res.message||""}):next();
        });
    },
    function(err){
        // 加载失败
        if(err){
            data.loading_desc_0_more = err.message||"";
            data.loading = 0;
        }else{
            data.loading = 2;
        }
        self.$update();
    }
);