js get time and implement conversion between string and timestamp

Less nonsense, just upload the code

The code copy is as follows:

//Get the current time:

var myDate = new Date();//Current time

var year = myDate.getFullYear();//Current year

var month = myDate.getMonth() + 1;//Current month

var day = myDate.getDate();//Current day

myDate.getYear(); //Get the current year (2 digits)

myDate.getFullYear(); //Get the full year (4 digits, 1970-????)

myDate.getMonth(); //Get the current month (0-11, 0 represents January)

myDate.getDate(); //Get the current day (1-31)

myDate.getDay(); //Get the current week X (0-6, 0 represents Sunday)

myDate.getTime(); //Get the current time (number of milliseconds starting from 1970.1.1)

myDate.getHours(); //Get the current number of hours (0-23)

myDate.getMinutes(); //Get the current number of minutes (0-59)

myDate.getSeconds(); //Get the current number of seconds (0-59)

myDate.getMilliseconds(); //Get the current number of milliseconds (0-999)

myDate.toLocaleDateString(); //Get the current date

var mytime=myDate.toLocaleTimeString(); //Get the current time

myDate.toLocaleString( ); //Get date and time

var oneDay = 1000 * 60 * 60 * 24;

//Get the date of the last week

var lastDate = new Date(myDate - oneDay * 6);

var lastYear = lastDate.getFullYear();

var lastMonth = lastDate.getMonth() + 1;

var lastDay = lastDate.getDate();

//Get the last day of the current month

var day = new Date(year ,month , 0);

var lastdate = day.getDate();//The last day of the current month

//Get the date of the last N months

var lastDate = new Date(myDate - oneDay * myDate.getDate());

lastDate = new Date(lastDate - N * oneDay * (lastDate.getDate() - 1));

var lastYear = lastDate.getFullYear();

var lastMonth = lastDate.getMonth() + 1;

var lastDay = lastDate.getDate();

//Convert string to timestamp

var date="2014-12-06";

date = new Date(Date.parse(date.replace(/-/g, "/")));

date = date.getTime();