x = screen.availWidth;
y = screen.availHeight;
xD = screen.width;
yD = screen.height;
var xpos= x/2 - 790/2;
var ypos= y/2 - 500/2;

//declare the variables
var Netscape, MSIE, Opera, Unknown;
var Win, Mac, Other;
var NetscapeVer, MSIEVer, OperaVer; 

// detect browser Netscape = navigator.appName == "Netscape";
MSIE = navigator.appName == "Microsoft Internet Explorer";
Opera = navigator.userAgent.indexOf("Opera") > -1;
Safari = navigator.userAgent.indexOf("Safari") > -1;
Unknown = !(Netscape || MSIE || Opera || Safari); 

// detect platform 
Win = navigator.userAgent.indexOf("Win") > -1;
Mac = navigator.userAgent.indexOf("Mac") > -1;
Other = !(Win || Mac);

function openWindow(url){
// now extract version numbers 
  if(Netscape) {
  NetscapeVer = parseFloat(navigator.appVersion);
  }
  else if(MSIE) {
    n = navigator.userAgent;
    MSIEVer = n.substr(n.indexOf("MSIE ")+("MSIE ").length, 4);
    MSIEVer = parseFloat(MSIEVer); // converts it into a floatint point number if(Opera) {
      OperaVer = n.substr(n.indexOf("Opera ")+("Opera ").length, 4);
      OperaVer = parseFloat(OperaVer);
    } 
	
// now open the oppropriate window;
if(Win) {
	window.open(url,"","fullscreen=1,scrollbars=no,statusbar=no,top=0,left=0");
  }
  else if(Mac) {
//    alert("Macs look nicer than PCs...<BR>");
	if(MSIE){
	window.open(url,"","width="+xD+",height="+yD+",left=0,top=0,statusbar=no");
	}else{
	window.open(url,"","width="+x+",height="+y+",left=0,top=0,statusbar=no");
  }
  }
  else {
    //alert("I don't know what platform you're using!<BR>");
  }
/*
// condition on browser... 
if(Netscape) {
    alert("You are running Netscape version " + NetscapeVer + "<BR>");
		window.open(url,"","width="+x+", height="+y+",scrollbars=0");
  	if(NetscapeVer < 4) {
    	alert("That's quite an old browser!<BR>");
		window.open(url,"","width="+x+", height="+y+",scrollbars=0");
    }
  }
  else if(MSIE) {
    alert("You are running MSIE version " + MSIEVer + "<BR>");
	window.open(url,"","fullscreen=1,scrollbars=0,top=0,left=0");
    if(Opera) {
      alert("... in the disguise of Opera version ");
      alert(OperaVer + "<BR>");
	  window.open(url,"","fullscreen=1,scrollbars=0,top=0,left=0");
    }
    else if(MSIEVer >= 5) {
      alert("http://www.iota-six.co.uk"); 
	  window.open(url,"","fullscreen=1,scrollbars=0,top=0,left=0");
    }
  }
  else if(Safari) {
    alert("Safari Sucks");
	window.open(url,"","width="+x+", height="+y+",scrollbars=0");
  }
  else {
    alert("I don't know what browser you're using!!<BR>");
	window.open(url,"","fullscreen=1,scrollbars=0,top=0,left=0");
  }
*/
}
//////////////////////////////////////////////////////////////////