// Place your application-specific JavaScript functions and classes here
// This file is automatically included by javascript_include_tag :defaults

function add( name ) {
  input = $( name );
  value = parseInt( input.value );
  value = value + 1;
  input.value = value;
}

function sub( name ) {
  input = $( name );
  value = parseInt( input.value );
  if( value > 1) {
    value = value - 1;
  } else {
    value = 1;
  }
  input.value = value;
}

function hide_array( container ) {
  var nodes = container.childNodes;
  for( var i = 0; i < nodes.length; i++ ) {
    if( nodes[i].nodeType == 1 ) {
      Element.hide( nodes[i] );
    }
  }
}

function tab( content_name ) {
  var content = $(content_name);
  hide_array( content.parentNode );
  Element.show( content );
}