Java Reference
In-Depth Information
and for the third and twenty-third days, you have this:
case 3:
case 23:
daySuffix = “rd”;
break;
Finally, you need the
default
case for everything else. As you will have guessed by now, this is simply
“th”
.
default:
daySuffix = “th”;
break;
}
In the fi nal lines you simply write the information to the HTML page, using document.write().
Setting Date Values
To change part of the date in a Date object, you have a group of set functions, which pretty much repli-
cate the get functions described earlier, except that you are setting, not getting, the values. These functions
are summarized in the following table.
Method
Description
setDate()
The date of the month is passed in as the parameter to set the date
setMonth()
The month of the year is passed in as an integer parameter, where 0 is January,
1 is February, and so on
setFullYear()
This sets the year to the four-digit integer number passed in as a parameter
Note that for security reasons, there is no way for web-based JavaScript to change the current date and
time on a user's computer.
So, to change the year to 2009, the code would be as follows:
myDateObject.setFullYear(2009);
Setting the date and month to the twenty-seventh of February looks like this:
myDateObject.setDate(27);
myDateObject.setMonth(1);
One minor point to note here is that there is no direct equivalent of the getDay() method. After the
year, date, and month have been defi ned, the day is automatically set for you.
