function do_it(id){
      var obj=document.getElementById(id);
      var prop=obj.style.display;
      if (prop=="block")
         obj.style.display="none";
      else
         obj.style.display="block";

  }

browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion);

if (browser_name == "Netscape" && browser_version >= 3.0) { roll = 'true'; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) { roll = 'true'; }
else { roll = 'false'; }

function load(location){
return image;
}

if (roll == 'true'){
tr=new Image();
tr.src="on.gif";
}

function show(where){
if (roll == 'true'){
stored=where;
storedLocation=document.images[where].src;
document.images[where].src="on.gif";
}

}

function hide(){
if (roll == 'true') document.images[stored].src=storedLocation;
}