项目中用到的js日期函数

<script type="text/javascript">

    //替换字符串 

    function Replace(str, from, to) {

        return str.split(from).join(to);

    }

    // 日期类型格式成指定的字符串

    function FormatDate(date, format) {

        format = Replace(format, "yyyy", date.getFullYear());

        format = Replace(format, "MM", GetFullMonth(date));

        format = Replace(format, "dd", GetFullDate(date));

        format = Replace(format, "HH", GetFullHour(date));

        return format;

    }

    //js日期字符串转换成日期类型

    function parseDate(dateStr) {

        return new Date(Replace(dateStr, "-", "/"));

    }

    //增加月 

    function AddMonths(date, value) {

        date.setMonth(date.getMonth() + value);

        return date;

    }

    //增加天 

    function AddDays(date, value) {

        date.setDate(date.getDate() + value);

        return date;

    }

    //增加时

    function AddHours(date, value) {

        date.setHours(date.getHours() + value);

        return date;

    }

    //返回月份(两位数) 

    function GetFullMonth(date) {

        var v = date.getMonth() + 1;

        if (v > 9) return v.toString();

        return "0" + v;

    }

 

    //返回日(两位数) 

    function GetFullDate(date) {

        var v = date.getDate();

        if (v > 9) return v.toString();

        return "0" + v;

    }

    //返回时(两位数)

    function GetFullHour(date) {

        var v = date.getHours();

        if (v > 9) return v.toString();

        return "0" + v;

    }

    //比较两个时间

    function compareDate() {

        var mydate = AddDays(parseDate("2012-08-23"), 1);

        var nowdate = new Date();

        if (nowdate.getTime() < mydate.getTime()) {

            return FormatDate(nowdate, "yyyy-MM-dd");

        }

        return FormatDate(mydate, "yyyy-MM-dd");

    }

</script>