multiple fields in one variable

New to Javascript.

 

Trying to create script for a future expiration date with 3 date fields. Client chooses expiration date - Have a drop down for the month, drop down for the day and a single line field for the year. How do I combine them to create an install by date that is 30 days from the date they enter?

 

Thanks in advance

var myDate=new Date();
// Field("Month") should return month number 0-11
myDate.setFullYear(Field("Year"),Field("Month"),Field("Day"));
myDate.setDate(myDate.getDate()+30);
return myDate;

Ok So it's working but how do I get to look like "January 14, 2012" instead of "Jan 14 2012 09:13:21 GMT-0800"

The easiest way is to use FusionPro's built in fuction for formatting dates.

Change the return line to be:

return FormatDate(myDate, "lm d, yyyy");