計算日期的另一種辦法

var createdon= crmForm.all.createdon.DataValue; 
var now = new Date(); 

//Set the two dates 
now =new Date(); 

//Set 1 day in milliseconds 
var one_day=1000*60*60*24; 

//Calculate difference btw the two dates, and convert to days 
var Age = Math.ceil((now.getTime()-createdon.getTime())/(one_day));
 

crmForm.all.new_field.DataValue= String(Age);