// Modified: 2005-01-03 from nice example @ Blogger.com 

function showhide (showhide_id) {  // Called with javascript:showhide('UniqueID')
   shid_element = document.getElementById(showhide_id);   
   if (shid_element.className=="shid_show") { // These mimic the CSS style .class
       shid_element.className="shid_hide";  } // If it's ==show, change to =hide,
   else { 
      shid_element.className="shid_show";   } // and vice-versa.
}