DateAdd函数： 复制代码 代码如下: function DateAdd(interval,number,date){ switch(interval.toLowerCase()){ case "y": return new Date(date.setFullYear(date.getFullYear()+number)); case "m": return new Date(date.setMonth(date.getMonth()+number)); case "d": return new Date(date.setDate(date.getDate()+number)); case "w": return new Date(date.setDate(date.getDate()+7*number)); case "h": return new Date(date.setHours(date.getHours()+number)); case "n": return new Date(date.setMinutes(date.getMinutes()+number)); case "s": return new Date(date.setSeconds(date.getSeconds()+number)); case "l": return new Date(date.setMilliseconds(date.getMilliseconds()+number)); } } DateDiff函数： 复制代码 代码如下: function DateDiff(interval,date1,date2){ var long = date2.getTime() - date1.getTime(); //相差毫秒 switch(interval.toLowerCase()){ case "y": return parseInt(date2.getFullYear() - date1.getFullYear()); case "m": return parseInt((date2.getFullYear() - date1.getFullYear())*12 + (date2.getMonth()-date1.getMonth())); case "d": return parseInt(long/1000/60/60/24); case "w": return parseInt(long/1000/60/60/24/7); case "h": return parseInt(long/1000/60/60); case "n": return parseInt(long/1000/60); case "s": return parseInt(long/1000); case "l": return parseInt(long); } } 兼容多浏览器的datediff函数 复制代码 代码如下: <script type="text/javascript"> function NewDate(str) { str = str.split('-'); var date = new Date(); date.setUTCFullYear(str[0], str[1] - 1, str[2]); date.setUTCHours(0, 0, 0, 0); return date; } function TimeCom(dateValue) { var newCom; if (dateValue == "") { newCom = new Date(); } else { newCom = NewDate(dateValue); } this.year = newCom.getYear(); this.month = newCom.getMonth() + 1; this.day = newCom.getDate(); this.hour = newCom.getHours(); this.minute = newCom.getMinutes(); this.second = newCom.getSeconds(); this.msecond = newCom.getMilliseconds(); this.week = newCom.getDay(); } function DateDiff(interval, date1, date2) { var TimeCom1 = new TimeCom(date1); var TimeCom2 = new TimeCom(date2); var result; switch (String(interval).toLowerCase()) { case "y": case "year": result = TimeCom1.year - TimeCom2.year; break; case "m": case "month": result = (TimeCom1.year - TimeCom2.year) * 12 + (TimeCom1.month - TimeCom2.month); break; case "d": case "day": result = Math.round((Date.UTC(TimeCom1.year, TimeCom1.month - 1, TimeCom1.day) - Date.UTC(TimeCom2.year, TimeCom2.month - 1, TimeCom2.day)) / (1000 * 60 * 60 * 24)); break; case "h": case "hour": result = Math.round((Date.UTC(TimeCom1.year, TimeCom1.month - 1, TimeCom1.day, TimeCom1.hour) - Date.UTC(TimeCom2.year, TimeCom2.month - 1, TimeCom2.day, TimeCom2.hour)) / (1000 * 60 * 60)); break; case "min": case "minute": result = Math.round((Date.UTC(TimeCom1.year, TimeCom1.month - 1, TimeCom1.day, TimeCom1.hour, TimeCom1.minute) - Date.UTC(TimeCom2.year, TimeCom2.month - 1, TimeCom2.day, TimeCom2.hour, TimeCom2.minute)) / (1000 * 60)); break; case "s": case "second": result = Math.round((Date.UTC(TimeCom1.year, TimeCom1.month - 1, TimeCom1.day, TimeCom1.hour, TimeCom1.minute, TimeCom1.second) - Date.UTC(TimeCom2.year, TimeCom2.month - 1, TimeCom2.day, TimeCom2.hour, TimeCom2.minute, TimeCom2.second)) / 1000); break; case "ms": case "msecond": result = Date.UTC(TimeCom1.year, TimeCom1.month - 1, TimeCom1.day, TimeCom1.hour, TimeCom1.minute, TimeCom1.second, TimeCom1.msecond) - Date.UTC(TimeCom2.year, TimeCom2.month - 1, TimeCom2.day, TimeCom2.hour, TimeCom2.minute, TimeCom2.second, TimeCom1.msecond); break; case "w": case "week": result = Math.round((Date.UTC(TimeCom1.year, TimeCom1.month - 1, TimeCom1.day) - Date.UTC(TimeCom2.year, TimeCom2.month - 1, TimeCom2.day)) / (1000 * 60 * 60 * 24)) % 7; break; default: result = "invalid"; } return (result); } </script>

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本文标题：JavaScript版DateAdd和DateDiff函数代码

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