JAVASCRIPT (60 баллов)
Объединить эти функции в одну
function setPrev()
{
var month = document.Control.month.selectedIndex - 1;
document.Control.month.selectedIndex = month;
var year = document.Control.year.selectedIndex + 1900;
formCalendar(month, year);
}

function setNext()
{
var month = document.Control.month.selectedIndex + 1;
document.Control.month.selectedIndex = month;
var year = document.Control.year.selectedIndex + 1900;
formCalendar(month, year);
}

function selectDate()
{
var year = document.Control.year.selectedIndex + 1900;
var month = document.Control.month.selectedIndex;
formCalendar(month, year);
}

(это КАЛЕНДАРЬ!)