document.write(new Date().getTime()); document.write('<br/>') var date1=new Date(1590024428000); document.write(date1)
document.write(new Date().getTime()); document.write('<br/>') var date1=new Date(1590024428000); document.write(date1)
https://stackoverflow.com/questions/419163/what-does-if-name-main-do