function toggle_element(identifier) {
  id = $('#'+identifier)
  if (id.css('display') == 'none') { id.css('display', 'block') } 
  else { id.css('display', 'none') }
} 

function toggle_list(identifier) {
	var header = 'list-header-' + identifier
	var list = 'list-' + identifier
	if ($(list).style.display == 'none') {
		$(header).style.background = 'url(/images/filter_arrow_down.gif) no-repeat center left'
		$(list).style.display = 'block'
	}
	else {
		$(header).style.background = 'url(/images/filter_arrow_right.gif) no-repeat center left'
		$(list).style.display = 'none'
	}
}

function external_links() { 
  if (!document.getElementsByTagName) return; 
  var anchors = document.getElementsByTagName('a'); 
  for (var i = 0; i < anchors.length; i++) { 
    var anchor = anchors[i]; 
    if (anchor.getAttribute('href') && anchor.getAttribute('rel') == 'external') 
      anchor.target = 'new'; 
  } 
}