function expand_contract(expanding_object){
  if (expanding_object.style.display != 'none') 
    expanding_object.style.display = 'none';
  else
    expanding_object.style.display = '';
}
function expand_contract_plus(expanding_object, value_object, value_object_value){
  if (expanding_object.style.display != 'none'){
    expanding_object.style.display = 'none';
    value_object.value = '[+] ' + value_object_value;
  }
  else{
    expanding_object.style.display = '';
    value_object.value = '[-] ' + value_object_value;
  }
}