Question

I’m very very new at programming, so please be gentle. I’ve been working with Dreamweaver for only a few days and I’m having trouble with adding 2 to a number in a cell, when the clock shows XX:00:00 or XX:30:00. In other words, I want the number 2 added to the content of the cell every half hour.

Answer 1

If I understand your question right, you would like to add 2 to some value every half hour?
You have tagged your post as both Java and Javascript, those are two different languages, so please correct. Since you have worked in Dreamviewer I assume you are developing web pages and the language you want to use is Javascript.

Setting a timer in Javascript:

setInterval(function(){myFunc()},1800000);  //1800000 = 30 minutes in milliseconds
function myFunc()
{
    //Code to update the cell
}

If you actually meant Java, the question is answered here: How to set a timer in java.