<!-- //
    var start_time = new Date("November 2, 2010 14:00 GMT"); // starting date and time
    var start_amount = 100; // amount at starting time
    var time_unit = 2904800000; // in this example, one week
    // note: time unit is specified in milliseconds
    // 1000 milliseconds = 1 second
    var change_per_time_unit = 300; // amount of change per time unit
    var now = new Date();
    var elapsed_time = now.getTime() - start_time.getTime();
    var elapsed_time_units = elapsed_time / time_unit;
    var current_amount = start_amount + (change_per_time_unit * elapsed_time_units);
    document.write(""+(current_amount.toFixed(2))+"&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;");
    // -->