The Coffee Counter

 1 var coffeeDataArea = "spanCoffeeCounter";
 2 
 3 function CalculateCoffee()
 4 {
 5     // -- Get the seconds since Jan 1, 1960
 6     var date = new Date();
 7     var secondsElapsed = Math.floor(date.getTime()/1000);
 8     
 9     // -- Subtract the seconds between Jan 1, 1960 and Jan 1, 2005
10     // -- to get the seconds between now and Jan 1, 2005 
11     // -- (the start of tracking)
12     secondsElapsed -= 1104641740;
13 
14     // -- Calculate out the current totals based on the tested 
15     // -- average amount of coffee, converted to coffee/second, 
16     // -- and using the average caffination of African tropical 
17     // -- coffee with weighting for expresso grinding and 
18     // -- bioling-down
19     var mL = secondsElapsed * 0.0095393518;    // milliliters
20     var mg = secondsElapsed * 0.0088738425;    // milligrams of 
21                                                // caffeine in the 
22                                                // above mL of coffee
23     
24     // -- Find the number of cups by converting from milliliters
25     var cups = mL * 0.00422675282;
26     
27     // -- Build the counter HTML
28     var html = "";
29     
30     html += " Since 2005: " + cups.toFixed(1) + " cups of coffee, " 
31           + mg.toFixed(2) + " mg of caffeine. ";
32     
33     // -- Display the counter HTML
34     try
35     {
36         document.getElementById(coffeeDataArea).innerHTML = html;
37     }
38     catch (exception)
39     {
40         // Span not loaded yet, the function started before 
41         // the page loaded, just go around again and we'll 
42         // get it next time.  This way, we avoid 
43         // having to use window.onload, and all those issues.
44     }
45 }
46 
47 // -- Start it up
48 setInterval("CalculateCoffee()", 1000);