function multisel_click(list,name) {
  var index = list.selectedIndex;
  if((index < list.length) && (index >= 0)) {
    if (list.options[index].className=='selected') {
      list.options[index].className='';
      list.options[index].style.backgroundColor = '';
    } else {
      list.options[index].className='selected';
      list.options[index].style.backgroundColor = '#dedede';
    }
    list.options[index].selected = false;
  }
  var sel = document.getElementById(name);
  sel.value = '';
  for(var i=0; i< list.length; i++) {
    if (list.options[i].className=='selected')
      sel.value += list.options[i].value + ':';
  }
  list.selectedIndex = index ; //-1;`
}