以下是我上次发布的日期检查脚本的更新版本。我想到使用函数查看关键日期是否在某个范围内，然后根据这些结果分配小时数。我已成功完成此操作并通过手动设置分配给变量current的日期进行错误检查。但它给了我足够的麻烦，我希望更有经验的眼睛看一看，看看是否有任何我错过的挥之不去的问题。
该脚本的工作原理如下。获取当前日期和星期几后，库的小时数将分配给一组数组。随后的变量集是我们的计划变更的日期。使每一个成为日期对象（而不是数字）似乎是比较苹果与苹果而不会得到错误结果的唯一方法。此外，它还使非程序员更容易更新脚本。在随后的函数中，将当前日期与这些函数进行比较，如果它落在该范围内，则函数返回true。 short_hours函数是必须存在的例外，因为我们在上午7:30到下午5点开放时有一些日子。最后，使用一组if语句调用函数，并使用true来设置函数从一个数组中设置当前小时数。我的代码如下。火焰离开！
http://jsfiddle.net/mjcodelib/XZF59/
//Code written by Michael Paulmeno
var current = new Date(); //creates new date object
var weekDay = current.getDay(); //gets day of week (0-6 in Javascript)
var hours = document.getElementById("hours"); //stores code to simplify if statements
//The variables below set the library's operating hours
var hours_regular = ["Sunday's Hours: 2:00PM to 10:00PM", "Monday's Hours: 7:30AM to 10:00PM", "Tuesday's Hours: 7:30AM to 10:00PM", "Wednesday's Hours: 7:30AM to 10:00PM","Thursday's Hours: 7:30AM to 10:00PM", "Friday's Hours: 7:30AM to 4:00PM", "Closed Today"];
var hours_exam = ["Sunday's Hours: 2:00PM to 12:00PM", "Monday's Hours: 7:30AM to 12:00PM", "Tuesday's Hours: 7:30AM to 12:00PM", "Wednesday's Hours: 7:30AM to 12:00PM", "Thursday's Hours: 7:30AM to 12:00PM", "Friday's Hours: 7:30AM to 4:00PM", "Closed Today"];
var hours_intercession = ["Closed Today", "Monday's Hours: 8:00AM to 4:30PM", "Tuesday's Hours: 8:00AM to 4:30PM", "Wednesday's Hours: 8:00AM to 4:30PM", "Thursday's Hours: 8:00AM to 4:30PM", "Friday's Hours: 8:00AM to 4:00PM", "Closed Today", "Today's Hours: 8am - 5pm"];
var hours_august_intercession = ["Closed Today", "Monday's Hours: 8:00AM to 5:00PM", "Tuesday's Hours: 8:00AM to 5:00PM", "Wednesday's Hours: 8:00AM to 5:00PM", "Thursday's Hours: 8:00AM to 5:00PM", "Friday's Hours: 8:00AM to 4:00PM", "Closed Today"];
var hours_shortened = "Today's Hours: 7:30AM to 5:00PM";
//These are the 'important dates' for the year. At each of these dates our operating hours change. The format is year + month + date.
//Change the values in parenthesis every year to reflect the important dates for the next academic year.
//Fall Dates
var fall_semester_begin = new Date (2014,7,18);
var fall_break_begin = new Date (2014,9,15);
var fall_break_end = new Date (2014,9,20);
var fall_exams = new Date (2014,11,8);
var thanksgiving_break = new Date (2014,10,24);
var thanksgiving_break_end = new Date (2014,11,1);
var winter_intercession = new Date (2014,11,14);
var winter_holidays = new Date (2015,11,23);
//Spring Dates
var winter_intercession2 = new Date (2015,0,1);
var spring_semester_begin = new Date (2015,0,12);
var spring_break_begin = new Date (2015,2,9);
var spring_break_end = new Date (2015,2,16);
var spring_exams = new Date (2015,4,4);
//Summer Dates
var may_intercession = new Date (2014,4,11);
var summer_hours_regular = new Date(2014,5,2);
var august_intercession = new Date (2014,6,31);
//The functions below compare the current date as formatted above to the important dates to determine at what point in the year the current date falls in.
function regular_hours_spring (today) {
if (today >= spring_break_end && today < spring_exams ||
today >= spring_semester_begin && today < spring_break_begin )
{
return true; }
else {
return false;
}
}
function regular_hours_summer (today){
if (today >= summer_hours_regular &&
today < august_intercession)
{
return true;}
else {return false;}
}
function regular_hours_fall (today) {
if (today >= thanksgiving_break_end && today < fall_exams ||
today >= fall_break_end && today < thanksgiving_break ||
today >= fall_semester_begin && today < fall_break_begin)
{
return true; }
else {
return false;
}
}
function exam_hours (today) {
if (today >= fall_exams && today <= winter_intercession ||
today >= spring_exams && today <= may_intercession)
{
return true; }
else {
return false;
}
}
function intercession_hours (today) {
if (today >= winter_intercession && today < winter_holidays ||
today >= thanksgiving_break && today < thanksgiving_break_end ||
today > fall_break_begin && today < fall_break_end ||
today >= august_intercession && today < fall_semester_begin ||
today >= may_intercession && today < summer_hours_regular ||
today > spring_break_begin && today < spring_break_end ||
today > winter_intercession2 && today < spring_semester_begin)
{
return true; }
else {
return false;
}
}
function short_hours (today) {
if (fall_break_begin && today > fall_semester_begin)
{
return true; }
else {
return false; }
}
function closed (today) {
if (today >= winter_holidays)
{
return true;
}
else {
return false; }
}
//The value returned by the functions above is logged to the error console for troubleshooting
console.log (regular_hours_spring(current));
console.log (regular_hours_summer(current));
console.log (regular_hours_fall(current));
console.log (exam_hours(current));
console.log (intercession_hours(current));
console.log (short_hours(current));
console.log (closed(current));
//The if statements below call the functions above and determine whether the hours displayed should be regular, exam, or intercession.
if (closed (current) && current >= winter_holidays) {
hours.innerHTML = "Closed Today";
}
else if(intercession_hours(current) && current >= august_intercession && current < fall_semester_begin) {
hours.innerHTML = hours_august_intercession[weekDay];
}
else if(intercession_hours(current)) {
hours.innerHTML = hours_intercession[weekDay];
}
else if (exam_hours (current)) {
hours.innerHTML = hours_exam[weekDay];
}
else if(regular_hours_spring(current)){
hours.innerHTML = hours_intercession[weekDay];
}
else if (regular_hours_summer (current)){
hours.innerHTML = hours_regular[weekDay];
}
else if (regular_hours_fall (current)){
hours.innerHTML = hours_regular[weekDay];
}
else if (short_hours ()) {
hours.innerHTML = hours_shortened;
}
else {hours.innerHTML = "<a href='http://www.deltastate.edu/academics/libraries/libraries-hours-of-operation/' target='_blank'>Click here for Library hours</a>"}