var browserType;

if (document.layers) {browserType = "nn4"}
if (document.all) {browserType = "ie"}
if (window.navigator.userAgent.toLowerCase().match("gecko")) {
   browserType= "gecko"
}

function hide(div) {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById(div)');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById(div)');
  else
     document.poppedLayer =   
        eval('document.layers[div]');
  document.poppedLayer.style.visibility = "hidden";
}

function show(div) {
  if (browserType == "gecko" )
     document.poppedLayer = 
         eval('document.getElementById(div)');
  else if (browserType == "ie")
     document.poppedLayer = 
        eval('document.getElementById(div)');
  else
     document.poppedLayer = 
         eval('document.layers[div]');
  document.poppedLayer.style.visibility = "visible";
}

function displaylightbox() {
if (ReadCookie('blockpopover') != 'yes') {
SetCookie('blockpopover','yes','1');  
setTimeout("show('overlay');show('lightbox');",1250);
}
}

function closeLightbox() {
hide('overlay');hide('lightbox');
}


function SetCookie(cookieName,cookieValue,nDays) {
 var today = new Date();
 var expire = new Date();
 if (nDays==null || nDays==0) nDays=1;
 expire.setTime(today.getTime() + 3600000*24*nDays);
 document.cookie = cookieName+"="+escape(cookieValue)
                 + ";expires="+expire.toGMTString();
}

function ReadCookie(cookieName) {
 var theCookie=""+document.cookie;
 var ind=theCookie.indexOf(cookieName);
 if (ind==-1 || cookieName=="") return ""; 
 var ind1=theCookie.indexOf(';',ind);
 if (ind1==-1) ind1=theCookie.length; 
 return unescape(theCookie.substring(ind+cookieName.length+1,ind1));
}