function show(id)
{
  var element = div_ref(id);
  
  var ua = navigator.userAgent.toLowerCase()
  var netscapebrowser = (ua.indexOf("mozilla")!=-1 && 
  ua.indexOf("compatible")==-1 && ua.indexOf("opera")==-1)
  var iebrowser = (ua.indexOf("msie")>-1)
 
   	if (element.style.visibility == "hidden") {
		if (iebrowser)	{
			element.style.height = 0;
		}
	    element.style.position = "relative";
	    element.style.visibility = "visible";
  	}
  	else	{
		if (iebrowser)	{
				element.style.height = 0;
		}
	    element.style.visibility = "hidden";
	    element.style.position = "absolute";
  	}
}

 // Funktion zur Referenzierung von Div-Layern
  function div_ref (id) {
    if      (document.layers)         return document.layers[id];         // NC 4
    else if (document.all)            return document.all[id];            // IE 4
    else if (document.getElementById) return document.getElementById(id); // DOM
    else                              return null;        
  }