Javascript Date的使用

字串變日期
// value:'2014/08/06'
 function becomeRealDate(split_realdata1){
  var   checkdate = split_realdata1.split('\/');
var year = parseInt(checkdate[0]);
var month = parseInt(checkdate[1]);
var day = parseInt(checkdate[2]);

var newdate = new Date();
newdate.setFullYear(year);
newdate.setMonth(month-1);
newdate.setDate(day);

return newdate;

 }

藉由實際日期值(Date)增加5天,獲得新日期值
//value: new Date(), 5
 function addDate(newdate , addday){
 var expectdate = new Date(newdate);
  expectdate.setDate(newdate.getDate()+addday);
  return expectdate;
 }

兩個日期的比較,如果值大於0 ,則date2較後期
//value: new Date , new Date
  function comparetime(date1 , date2){
 start = Math.floor( date1.getTime() / (3600*24*1000)); //days as integer from..
end   = Math.floor( date2.getTime() / (3600*24*1000)); //days as integer from..
daysDiff = end - start; // exact dates
return daysDiff;

 }