jquery 时间大小比较和获取当前时间

  var start = new Date(row.InsuranceStime.replace("-", "/").replace("-", "/"));
                        var end = new Date(row.InsuranceEtime.replace("-", "/").replace("-", "/"));
                        // alert(start+"**"+(new Date(‘1900/01/01 00:00:000‘)))
                        if (Date.parse(‘1900/01/01 00:00:000‘) === Date.parse(start) || Date.parse(‘1900/01/01 00:00:000‘) === Date.parse(end)) {
                            return "<font>未投保</font>";
                            
                        } else {
                            var today = new Date(mydate.toDateString() + " " + mydate.toTimeString());
                            if (end < today) {
                                return "<font>已过期</font>";
                            }
                            if (start > today) {
                                return "<font>未生效</font>";
                            }
                            if (row.InsuranceMoney === 0) {
                                return "<font>未投保</font>";
                            } else {
                                return "已投保";
                            }
                        }