function SwitchYear(oSelect, bLoad){
  for(var i=0, opt=null; (opt=oSelect.options[i]); i++){
    var oTbl=document.getElementById('year_'+opt.value);
    if(oTbl && oTbl.className.search(/none/gi)==-1){oTbl.className+=' none';}
  }
  oTbl=document.getElementById('year_'+oSelect.options[oSelect.selectedIndex].value);
  if(oTbl && oTbl.className.search(/none/gi)!=-1){oTbl.className=oTbl.className.replace(/ none/gi,'');}
}
function ResetYears(){if(document.forms['yearselection']){document.forms['yearselection'].reset();}}