Javascript acquisition this week, this month, this season, this year, last month, last week, last quarter, last year, last two weeks, last month

Javascript get this week, this month, this season, this year, last month, last week, last quarter, last year, last two weeks, last month

Function datechange (name) {var begintimeobject = document. getelementbyid ("begintime"); var endtimeobject = document. getelementbyid ("endtime"); var begintime; var endtime; var now = new date (); var month = now. getmonth (); var year = now. getfullyear (); var day = now. getdate (); var wday = now. getday (); Switch (name) {Case "Tweek": // var day = now this week. getday (); now. setdate (now. getdate ()-(day-1); begintime = formatdate (now); now. setdate (now. getdate () + 6); endtime = formatdate (now); break; Case "tmonth": // This month now. setdate (1); begintime = formatdate (now); var days = getdays (now); now. setdate (days); endtime = formatdate (now); break; Case "tquarter": // var M = now this season. getmonth () + 1; var q = parseint (m + 2)/3); // obtain the quarter M = Q * 3-2; // get the first month of the season now. setmonth (m-1); now. setdate (1); begintime = formatdate (now); now. setmonth (now. getmonth () + 3); now. setdate (0); endtime = formatdate (now); break; Case "tyear": // now this year. setmonth (0); now. setdate (1); begintime = formatdate (now); now. setmonth (11); now. setdate (31); endtime = formatdate (now); break; Case "today": // Today begintime = formatdate (now); endtime = begintime; break; Case "pweek ": // last week var day = now. getday (); now. setdate (now. getdate ()-(day-1)-7); begintime = formatdate (now); now. setdate (now. getdate () + 6); endtime = formatdate (now); break; Case "pmonth": // last month now. setdate (1); now. setmonth (now. getmonth ()-1); begintime = formatdate (now); var days = getdays (now); now. setdate (days); endtime = formatdate (now); break; Case "pquarter": // var M = now in the previous quarter. getmonth () + 1; var q = parseint (m + 2)/3); // obtain the quarter M = Q * 3-2; // get the first month of the quarter M = m-3; // The last season now. setmonth (m-1); now. setdate (1); begintime = formatdate (now); now. setmonth (now. getmonth () + 3); now. setdate (0); endtime = formatdate (now); break; Case "pyear": // last year now. setfullyear (now. getfullyear ()-1); now. setmonth (0); now. setdate (1); begintime = formatdate (now); now. setmonth (11); now. setdate (31); endtime = formatdate (now); break; Case "p2week": // var day = now in the last two weeks. getday (); now. setdate (now. getdate ()-(day-1)-7*2); begintime = formatdate (now); now. setdate (now. getdate () + 6 + 7); endtime = formatdate (now); break; Case "p2month": // last month now. setdate (1); now. setmonth (now. getmonth ()-1*2); begintime = formatdate (now); now. setmonth (now. getmonth () + 2); now. setdate (0); endtime = formatdate (now); break; Case "customize": // custom begintime = ""; endtime = ""; break;} begintimeobject. value = begintime; endtimeobject. value = endtime ;}

From: http://hi.baidu.com/xixitie/item/b3d98eeca9d9633987d9de66