JS Date range initialization Gets the first one month date method _javascript Tips

This article describes the JS date range initialization of the first one months of the date of the method. Share to everyone for your reference. The specific analysis is as follows:

Today to do the initialization of the time range, starting time is the first one months of the current time, finally found the perfect solution.

Date.prototype.format = function (format) {
 var o = {
  "m+": This.getmonth () + 1,//month
  "d+": This.getdate ( ),//day
  "h+": this.gethours (),//hour
  "m+": this.getminutes (),//minute
  "s+": This.getseconds (),//sec Ond
  "q+": Math.floor (This.getmonth () + 3)/3),//Quarter
  "S": This.getmilliseconds ()
 //millisecond
   
    }
 if (/(y+)/.test (format))
  format = Format.replace (regexp.$1, this.getfullyear () + "")
    . substr (4- regexp.$1.length));
 For (var k in O)
  if (new RegExp ("+ K +")). Test (format)
   format = Format.replace (regexp.$1, Regexp.$1.lengt h = = 1? O[k]
     : ("+ o[k]"). substr (("" "+ o[k]). length);
 return format;
}
var begin=new Date ();
var end=new Date ();
New Date ((new Date (). GetMonth ()-1)) Begin.setmonth;
var begintime= begin. Format ("Yyyy-mm-dd");
var endtime=end. Format ("Yyyy-mm-dd");
$ (' #txtBeginVisitTime '). Val (begintime);
$ (' #txtEndVisitTime '). Val (Endtime);
   

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