JS 获得两个时间间隔天数
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head></head><body><input type=text value="2008-02-04" id="gmtStartDay"><input type=text value="2008-03-04" id ="gmtEndDay"><input type=button id=bt value="OK" onclick="javascript:checkDiffDays();"/></body><script language=javascript>//计算两个日期的差值,并弹出窗口，提醒错误function checkDiffDays() { var gmtStartDay = document.getElementById("gmtStartDay").value; var gmtEndDay = document.getElementById("gmtEndDay").value; var diffDays = getDiffDays(gmtStartDay,gmtEndDay);if (diffDays > 90) {alert("间隔时间无效，间隔时间不能大于90天！");return false;}alert(diffDays);return true;}//得到两个日期的间隔时间的天数function getDiffDays(date1,date2) { var regexp=/^(\d{1,4})[-|\.]{1}(\d{1,2})[-|\.]{1}(\d{1,2})$/; var monthDays=[0,3,0,1,0,1,0,0,1,0,0,1]; regexp.test(date1); var date1Year=RegExp.$1; var date1Month=RegExp.$2; var date1Day=RegExp.$3; regexp.test(date2); var date2Year=RegExp.$1; var date2Month=RegExp.$2; var date2Day=RegExp.$3;if (validatePeriod(date1Year,date1Month, date1Day, date2Year, date2Month, date2Day)) {var firstDate = new Date(date1Year, date1Month, date1Day);var secondDate = new Date(date2Year, date2Month, date2Day);var result = Math.floor((secondDate.getTime() - firstDate.getTime()) / (1000*3600*24));for(j = date1Year; j < date2Year; j++) {if (isLeapYear(j)) {monthDays[1] = 2;} else {monthDays[1] = 3;}for(i = date1Month -1 ; i < date2Month; i++) {result = result - monthDays[i]}}return result;} else {return ;}if(validatePeriod(date1Year,date1Month,date1Day,date2Year,date2Month,date2Day)){ firstDate=new Date(date1Year,date1Month,date1Day); secondDate=new Date(date2Year,date2Month,date2Day); result=Math.floor((secondDate.getTime()-firstDate.getTime())/(1000*3600*24)); for(j=date1Year;j<=date2Year;j++){ if(isLeapYear(j)){ monthDays[1]=2; }else{ monthDays[1]=3; } for(i=date1Month-1;i<date2Month;i++){ result=result-monthDays[i]; } } return result; }else{ return 'the first field must before the second date.'; }}//判断年份是否是闰年function isLeapYear(year) {if (year % 4 == 0 && (year % 100 != 0) || (year % 400 == 0)) {return true;}return false;}//判断前后两个日期function validatePeriod(fyear, fmonth, fday, byear, bmonth, bday) {if (fyear < byear) {return true;} else if (fyear == byear) {if (fmonth < bmonth) {return true;} else if (fmonth == bmonth) {if (fday <= bday) {return true;} else {return false;}} else {return false;}} else {return false;}}</script></html>