function enable(elem){
  document.getElementById(elem).className=document.getElementById(elem).className.replace(/disabled/gi,"");
  document.getElementById(elem+"2").checked=true;
  document.getElementById(elem).disabled=false;
}
function disable(elem){
  document.getElementById(elem).className+=" disabled";
  document.getElementById(elem).disabled=true;
}
function toggle(id){
  var filter = document.getElementById(id);
  if(filter.style.display=="block"){
    filter.style.display="none";
  } else {
    filter.style.display="block";
  }
}