/* reset.css */
a {
  text-decoration: none;
}
ol, ul {
  list-style: none;
}
* {
  padding: 0px; 
  margin: 0px; 
}
iframe, fieldset, img{
  border: none;
}
table{
  border-collapse: collapse;
  border-spacing: 0;
}
address, caption, label, cite, code, em, strong, th {
  font-style: normal;
  font-weight: normal;
}
h1 {
  font-size: 120%;
}
h2, h3 {
  font-size: 100%;
}
h4, h5 {
  font-size: 90%;
}
h6 {
  font-size: 80%;
}

/* global.css */

/* cursor */

.button {
  cursor: pointer;
}
.hint {
  cursor: help;
}


/* display */

.invisible {
  visibility: hidden;
}
.hidden {
  display: none;
}


/* rollovers */

.rollover-image {
  background-position: top left;
  background-repeat: no-repeat;
  cursor: pointer;
}
a:hover .rollover-image {
  background-position: bottom right;
}

.centred-rollover-image {
  background-position: top center;
  background-repeat: no-repeat;
  cursor: pointer;
}
a:hover .centred-rollover-image {
  background-position: bottom center;
}

/* history.css */
#history {
  visibility: none;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
#history-iframe {
  position: relative;
  display: absolute;
  width: 1px;
  height: 1px;
}