js比较2个时间大小

var x=new Date(); x.setFullYear(2100,0,14);var today = new Date(); if (x>today)   {   alert("Today is before 14th January 2100");   } else   {   alert("Today is after 14th January 2100");   }

var myDate=new Date(); myDate.setDate(myDate.getDate()+5);