function onYearChange() {
var yearSelected = document.getElementById( "yearSelector" ).value;
if( yearSelected ) {
    showYear( yearSelected );
    }
}
function setYear( nYear ) {
    document.getElementById( "yearSelector" ).value = nYear;
    onYearChange();
    }
function showYear( nYear ) {
var yearCurrent;
for( i = 2002; i < 2010; i++ ) {
    if( yearCurrent = document.getElementById( "id" + i ) ) {
        yearCurrent.style.display = 'none';
        }
    }
if( yearCurrent = document.getElementById( "id" + nYear ) ) {
    yearCurrent.style.display = 'block';
    }
}