function showDoc(docName) {
      window.open(docName,'',"width=600,height=500,status=no,scrollbars=yes,location=no,screenY=120,screenX=100,resizable=yes,");
}

function setCookie(name, value, expire) {
   document.cookie = name + "=" + escape(value)
   + ((expire == null) ? "" : ("; expires=" + expire.toGMTString()))
}

function registerCookie(value) {
   var today = new Date();
   var expires = new Date();
   expires.setTime(today.getTime() + 1000*60*60*24);
   setCookie("ChemistryLive", value, expires);
}

function getCookie(name)
{
   var search = name + "="
   if (document.cookie.length > 0) { // if there are any cookies
      offset = document.cookie.indexOf(search) 
      if (offset != -1) { // if cookie exists 
         offset += search.length 
         // set index of beginning of value
         end = document.cookie.indexOf(";", offset) 
         // set index of end of cookie value
         if (end == -1) 
            end = document.cookie.length
         return unescape(document.cookie.substring(offset, end))
      } 
   }
}

var appName = navigator.appName;
var appVersion = parseFloat(navigator.appVersion);
var appCodeName = navigator.appCodeName;
var msg1 = "For best results, please upgrade your browser to version 4.0 or better of Internet Explorer or Netscape before proceeding.";
var msg2 = "Please ensure that your browser is enabled for Java or upgrade if necessary.";
var beenHere = getCookie("ChemistryLive");

	if( (appName == "Netscape" && appVersion < 4) || (appName == "Microsoft Internet Explorer" && appVersion < 4))
	{
		if (beenHere == null)  // Display "upgrade request" message
		{
			alert("The browser you are using is " + appName + " R" + appVersion + ".\n\n" + msg1);
			// window.location.href="gigs.php3";
			registerCookie(1);
		}
	}