js日期计算时间差.doc

function getnumber(date1,date2)/默认格式为20030303,根据自己需要改格式和方法var year1 = date1.substr(0,4);var year2 = date2.substr(0,4); var month1 = date1.substr(4,2);var month2 = date2.substr(4,2);var day1 = date1.substr(6,2);var day2 = date2.substr(6,2);temp1 = year1+/+month1+/+day1;temp2 = year2+/+month2+/+day2;var dateaa= new Date(temp1); var datebb = new Date(temp2); var date = datebb.getTime() - dateaa.getTime(); var time = Math.floor(date / (1000 * 60 * 60 * 24);alert(time); function DateDiff(strInterval, dtStart, dtEnd) var dtStart = new Date(dtStart); if (isNaN(dtStart) dtStart = new Date(); var dtEnd = new Date(dtEnd); if (isNaN(dtEnd) dtEnd = new Date(); switch (strInterval) case s:return parseInt(dtEnd - dtStart) / 1000); case n:return parseInt(dtEnd - dtStart) / 60000); case h:return parseInt(dtEnd - dtStart) / 3600000); case d:return parseInt(dtEnd - dtStart) / 86400000); case w:return parseInt(dtEnd - dtStart) / (86400000 * 7); case m:return dtEnd.getMonth() - dtStart.getMonth(); case y:return dtEnd.getFullYear() - dtStart.getFullYear(); Dtotype.dateDiff = function(interval,objDate) /若參數不足或 objDate 不是日期物件則回傳 undefined if(arguments.length2|objDate.constructor!=Date) return undefined; switch (interval) /計算秒差 case s:return parseInt(objDate-this)/1000); /計算分差 case n:return parseInt(objDate-this)/60000); /計算時差 case h:return parseInt(objDate-this)/3600000); /計算日差 case d:return parseInt(objDate-this)/86400000); /計算週差 case w:return parseInt(objDate-this)/(86400000*7); /計算月差 case m:return (objDate.getMonth()+1)+(objDate.getFullYear()-this.getFullYear()*12)-(this.getMonth()+1); /計算年差 case y:return objDate.getFullYear()-this.getFullYear(); /輸入有誤 default:return undefined; 呼叫此方法的範例如下: var sDT = new Date(2004/05/20 07:30:00);var eDT = new Date(2005/05/20 08:32:02);document.writeln(秒差 : +sDT.dateDiff(s,eDT)+);document.writeln(分差 : +sDT.dateDiff(n,eDT)+);document.writeln(時差 : +sDT.dateDiff(h,eDT)+);document.writeln(日差 : +sDT.dateDiff(d,eDT)+);document.writeln(週差 : +sDT.dateDiff(w,eDT)+);document.writeln(月差 : +sDT.dateDiff(m,eDT)+);document.writeln(年差 : +sDT.dateDiff(y,eDT)+);Dtotype.format = function(formatter) if(!formatter | formatter = ) formatter = yyyy-MM-dd; var year = this.getYear().toString(); var month = (this.getMonth() + 1).toString(); var day = this.getDate().toString(); var yearMarker = formatter.replace(/y|Y/g,); if(yearMarker.length = 2) year = year.substring(2,4); var monthMarker = formatter.replace(/m|M/g,); if(monthMarker.length 1) if(month.length = 1) month = 0 + month; var dayMarker = formatter.replace(/d/g,); if(dayMarker.length 1) if(day.length = 1) day = 0 + day; return formatter.replace(yearMarker,year).replace(monthMarker,month).replace(dayMarker,day); Date.parseString = function(dateString,formatter) var today = new Date(); if(!dateString | dateString = ) return today; if(!formatter | formatter = ) formatter = yyyy-MM-dd; var yearMarker = formatter.replace(/y|Y/g,); var monthMarker = formatter.replace(/m|M/g,); var dayMarker = formatter.replace(/d/g,); var yearPosition = formatter.indexOf(yearMarker); var yearLength = yearMarker.length; var year = dateString.substring(yearPosition ,yearPosition + yearLength) * 1; if( yearLength = 2) if(year 50 ) year += 2000; else year += 1900; var monthPosition = formatter.indexOf(monthMarker); var month = dateString.substring(monthPosition,monthPosition + monthMarker.