js 获取当前时间 XXXX-XX-XX 格式

var date = new Date();
        var seperator1 = "-";
        var year = date.getFullYear();
        var month = date.getMonth() + 1;
        var strDate = date.getDate();
        if (month >= 1 && month <= 9) {
            month = "0" + month;
        }
        if (strDate >= 0 && strDate <= 9) {
            strDate = "0" + strDate;
        }
        var currentdate = year + seperator1 + month + seperator1 + strDate;if (ReturnDate > currentdate) {
            $.messager.show('退仓日期不能早于当前日期', 'red')
            return false;
        }