var layerRef;
var styleRef;

if ( navigator.appName == "Netscape" ) { 
  if ( parseInt(navigator.appVersion) > 4 ) { 
      layerRef="document.getElementById('"; 
      styleRef="').style"; 
     } 
  else { 
    layerRef="document."; 
    styleRef=""; 
    } 
} 
else { 
 layerRef="document.all."; 
 styleRef=".style"; 
 } 

function showDiv(layer) { 
 eval(layerRef+'wt2'+styleRef+'.visibility = "visible"'); 
}