var dateTo=new Date("8:00 1/ 4/2014");
Get the time object of the specified date. If it is empty, it defaults to the current time.
var date=dateTo.getTime()
Get the number of milliseconds, starting and ending in 1970
var y=date.getFullYear();
Get the year
var mm=date.getMonth() 1;
Get the month
var d=date.getDate();
Get date
var h=date.getHours();
Get the hours
var m=date.getMinutes();
Get the minutes
var s= date.getSeconds();
Get seconds
The idea of countdown is to calculate the time difference between two times, and then use
setInterval(); just execute the corresponding function once per second
This process may also use the following functions:
parseInt($trNum);
This function converts string type numbers into numeric types.