Datejs Help: Move Date in "Textbox1" to Next Month End in "Textbox2"

There are a number of problems with your code. Let's first talk about the syntax errors:

This is the code as you've quoted it:

var MonthEnded = thisgetField("Month Ended").value;
MonthEnded.moveToLastDayOfMonth();
MonthEnded.addMonths(1);
MonthEnded.moveToLastDayofMonth();
event.value = util.printd("mm/dd/yyyy",MonthEnded");

In line 1, you need a period between "this" and "getField".

In line 5, there is an extra double-quote just before the final ")", this needs to be removed. These two problems are being reported on the JavaScript console, which you can bring up using Ctrl-J or Cmd-J. After these two changes, you should not get any simple syntax errors anymore. Now we are talking about errors in how you programmed this snippet.

The biggest problem is that you are trying to reference the DateJS library, which is not available in Acrobat. It's actually not even available when you create JavaScript for a web page - unless you include it in your code. You might be able to do this in Acrobat as well, but this is not what I would recommend - unless you want to spend the time required to make sure that you are not running into any strange side effects.

To include this library, download it from http://www.datejs.com/

The best way to add it to your system is to create a folder level script - this way you can make sure that it only gets included once. If that is not possible because you are trying to distribute your document outside of your organization, then the next best thing is to create a document level script (e.g. call it DateJS) and add the whole library. Now you should be able to use in in your code. But that will bring up other problems:

JavaScript is case sensitive, so you need to fix the case of the "o" in moveToLastDayofMonth - make it moveToLastDayOfMonth. However, you can only use this on a Date object that was modified by DateJS - to create a date object, you need to create it via the "new" operator. Here is the fixed code (which again, will only work if you include DateJS):

var MonthEnded = new Date(this.getField("Month Ended").value);
MonthEnded.moveToLastDayOfMonth();
MonthEnded.addMonths(1);
MonthEnded.moveToLastDayOfMonth();
event.value = util.printd("mm/dd/yyyy", MonthEnded);