JS中常用的日期处理方法

// Javascript 对时间的代号// 0-11数字表示1-12月: var a= new Date(2006,5,6) 结果是2006-6-6// 0-6表示星期// 1-31表示日期// 0-23小时// 0-59分钟,秒// 两个日期的差值(d1 - d2).function DateDiff(d1,d2){    var day = 24 * 60 * 60 *1000;try{            var dateArr = d1.split("-");   var checkDate = new Date();        checkDate.setFullYear(dateArr[0], dateArr[1]-1, dateArr[2]);   var checkTime = checkDate.getTime();     var dateArr2 = d2.split("-");   var checkDate2 = new Date();        checkDate2.setFullYear(dateArr2[0], dateArr2[1]-1, dateArr2[2]);   var checkTime2 = checkDate2.getTime();       var cha = (checkTime - checkTime2)/day;          return cha;    }catch(e){   return false;}}// end fun// 三、应用：<mce:script language="javascript" type="text/javascript"><!--var flag = Array();// 全局变量var start = "2009-01-01";var end = "2009-02-24";SetFlag(start,end); for(var i=0; i<flag.length; i++){   document.write(flag[i]+"/n/r");}// 设置周期内的日期(数组)function SetFlag(start,end){var cdate = Array();cdate = start.split("-");var cd = cdate[1]+"/"+cdate[2]+"/"+cdate[0]; var dayNum = DateDiff(end,start);for(var i=0; i<=dayNum; i++){   flag.push(AddDays(cd,i));}}// end fun// 日期加上天数后的新日期.function AddDays(date,days){var nd = new Date(date);   nd = nd.valueOf();   nd = nd + days * 24 * 60 * 60 * 1000;   nd = new Date(nd);   // alert(nd.getFullYear() + "年" + (nd.getMonth() + 1) + "月" + nd.getDate() +// "日");var y = nd.getFullYear();var m = nd.getMonth()+1;var d = nd.getDate();if(m <= 9) m = "0"+m;if(d <= 9) d = "0"+d; var cdate = y+"-"+m+"-"+d;return cdate;}// 两个日期的差值(d1 - d2).function DateDiff(d1,d2){    var day = 24 * 60 * 60 *1000;try{            var dateArr = d1.split("-");   var checkDate = new Date();        checkDate.setFullYear(dateArr[0], dateArr[1]-1, dateArr[2]);   var checkTime = checkDate.getTime();     var dateArr2 = d2.split("-");   var checkDate2 = new Date();        checkDate2.setFullYear(dateArr2[0], dateArr2[1]-1, dateArr2[2]);   var checkTime2 = checkDate2.getTime();       var cha = (checkTime - checkTime2)/day;          return cha;    }catch(e){   return false;}}// end fun// --></mce:script>//instanceof 比较类型是否一至

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