function YearSelect(){
        if (document.Links.SelectYear.options[document.Links.SelectYear.selectedIndex].value != "none"){
        location = document.Links.SelectYear.options[document.Links.SelectYear.selectedIndex].value}
}

function PeriodSelect(){
        if (document.Links.SelectPeriod.options[document.Links.SelectPeriod.selectedIndex].value != "none"){
        location = document.Links.SelectPeriod.options[document.Links.SelectPeriod.selectedIndex].value}
}