Difference between revisions of "Manipulating Dates"

Revision as of 13:03, 16 August 2010

The following JavaScript functions are built-in to SmartSimple to assist with manipulation and calculations using dates:

ConvertDateStr

Takes a date that is in the users preferred display format and returns the date in the standard database format of yyyy-mm-dd.

Syntax:

ConvertDateStr(date,'@dateformat@')

Where:

• date is the date you wish to change to the yyyy-mm-dd' format.

Example:

var newDate=ConvertDateStr(frm.startdate.value,'@dateformat@');

ConvertDate

Takes a date that is in the standard database format of yyyy-mm-dd and converts it to the preferred display format of the current user.

Syntax:

ConvertDate(date,'@dateformat@')

Where:

• date is the date you wish to change to the users preferred display format.

Example:

var newDate=ConvertDate(sdate,'@dateformat@');

Notes

• When populating a date field that is displayed on the page it must be added in the preferred date format of the current user, as the system will automatically change it to yyyy-mm-dd when the page is saved.

dateadd

Add the specified interval to a date

Syntax:

dateadd(date,unit,interval)

Where:

• date is the date you wish to add to (or delete from) in format yyyy-mm-dd
• unit specifies what is being added:

• 'd' (days)
• 'm' (months)
• 'y' (years)

• interval is the number of days/months/years to be added.

Example:

var newDate=ConvertDate(sdate,'m',duration);

Example

The following example adds a specified number of months (saved in cf_123456) to the startdate, and saves it as the enddate.

var sdate=ConvertDateStr(frm.startdate.value,'@dateformat@');
var duration=parseInt(parseFloat(frm.cf_123456.value));
if(isNaN(duration)){
   alert("Invalid Duration provided");
   return;
   }
var edate=dateadd(sdate,'m',duration);
frm.enddate.value=ConvertDate(edate,"@dateformat@");

See Also

• busdateadd
• isHoliday
• Custom Defined Holidays