Get current quarter in year with javascript

Question

How can I get the current quarter we are in with javascript? I am trying to detect what quarter we are currently in, e.g. 2.

EDIT And how can I coun

Answer 1

Depend on month

 var date = new Date();     
 var quarter =  parseInt(date.getMonth() / 3 ) + 1 ;

Depend on Date

 var date = new Date();    
 var firstday = new Date(date.getFullYear(),0,1); // XXXX/01/01
 var diff = Math.ceil((date - firstday) / 86400000); 
 // a quarter is about 365/4 
 quarter =  parseInt( diff / ( 365/ 4 )) + 1 
 // if today is 2012/01/01, the value of quarter  is  1.