我正在开发一个有两个背靠背网络广播的网站.我已经使用PHP来显示应该启用和禁用按钮的时间.现在我需要使用Javascript在第一次广播之前,第二次广播之前和第二次广播之后自动刷新页面.我实现了以下脚本,它确实在给定时间刷新页面,但是,它不能完全按照我的需要工作.我需要更改脚本,以便在星期日美国东部时间下午7:45,晚上8点和晚上8:30刷新页面.

我正在使用修改后的脚本from this answered question

function refreshAt(hours, minutes, seconds) {
var now = new Date();
var then = new Date();

if(now.getUTCHours() > hours ||
   (now.getUTCHours() == hours && now.getUTCMinutes() > minutes) ||
    now.getUTCHours() == hours && now.getUTCMinutes() == minutes && now.getUTCSeconds() >= seconds) {
    then.setUTCDate(now.getUTCDate() + 1);
}
then.setUTCHours(hours);
then.setUTCMinutes(minutes);
then.setUTCSeconds(seconds);

var timeout = (then.getTime() - now.getTime());
setTimeout(function() { window.location.reload(true); }, timeout);
}

然后我调用refreshAt()函数.

refreshAt(19,45,0); //Will refresh the page at 7:45pm
refreshAt(20,00,0); //Will refresh the page at 8:00pm
refreshAt(20,30,0); //Will refresh the page at 8:30pm

我感到困惑的是如何改变这个脚本只在周日实现EST的刷新.

解决方法:

我想到了.这是脚本：

function refreshAt(hours, minutes, seconds, day) {
    var now = new Date();
    var then = new Date();
    var dayUTC = new Date();

    if(dayUTC.getUTCDay() == day) {

        if(now.getUTCHours() > hours ||
       (now.getUTCHours() == hours && now.getUTCMinutes() > minutes) ||
        now.getUTCHours() == hours && now.getUTCMinutes() == minutes && now.getUTCSeconds() >= seconds) {
        then.setUTCDate(now.getUTCDate() + 1);
        }

    then.setUTCHours(hours);
    then.setUTCMinutes(minutes);
    then.setUTCSeconds(seconds);


    var timeout = (then.getTime() - now.getTime());
    setTimeout(function() { window.location.reload(true); }, timeout);
    }
}

然后我只调用refreshAt()函数：

 refreshAt(20,00,0,1); //Will refresh the page at 8:00pm on Monday UTC or 3:00pm EST