function showhide(element_name) {
    link_id = element_name + '-link';
    content_id = element_name + '-content';
    if(document.getElementById(content_id).style.display == 'block') {
        hide(link_id, content_id);
    }
    else {
        show(link_id, content_id);
    }
}

      function hide(link_id, content_id) {
        document.getElementById(link_id).style.backgroundImage ='url(/images/arrow.gif)';
        document.getElementById(content_id).style.display='none';
	document.getElementById(content_id).style.paddingTop = "0px";
      }

      function show(link_id, content_id) {
        document.getElementById(link_id).style.backgroundImage ='url(/images/arrow-down.gif)';
        document.getElementById(content_id).style.display='block';
	document.getElementById(content_id).style.paddingTop = "15px";
      }