browserName = navigator.appName; 
      browserVer = parseInt(navigator.appVersion); 
      browser = "NotOk"; 
	previous=0;

      if (browserName == "Netscape" && browserVer >= 3) { browser = "ok"} 
      if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) { browser =
      "ok"} 

      if (browser == "ok") { 

           menu1= new Image(); menu1.src = "histmenu/land_a.gif"; 
           menu1on = new Image(); menu1on.src = "histmenu/land_b.gif";
           menu2= new Image(); menu2.src = "histmenu/people_a.gif"; 
           menu2on = new Image(); menu2on.src = "histmenu/people_b.gif"; 
           menu3= new Image(); menu3.src = "histmenu/contact_a.gif"; 
           menu3on = new Image(); menu3on.src = "histmenu/contact_b.gif";
           menu4= new Image(); menu4.src = "histmenu/culture_a.gif"; 
           menu4on = new Image(); menu4on.src = "histmenu/culture_b.gif";
           menu5= new Image(); menu5.src = "histmenu/coming_a.gif"; 
           menu5on = new Image(); menu5on.src = "histmenu/coming_b.gif";
           menu6= new Image(); menu6.src = "histmenu/initial_a.gif"; 
           menu6on = new Image(); menu6on.src = "histmenu/initial_b.gif";
           menu7= new Image(); menu7.src = "histmenu/further_a.gif"; 
           menu7on = new Image(); menu7on.src = "histmenu/further_b.gif";
           menu8= new Image(); menu8.src = "histmenu/diocese_a.gif";
           menu8on = new Image(); menu8on.src = "histmenu/diocese_b.gif";             
           menu9= new Image(); menu9.src = "histmenu/woman_a.gif"; 
           menu9on = new Image(); menu9on.src = "histmenu/woman_b.gif";
           menu10= new Image(); menu10.src = "histmenu/from_a.gif"; 
           menu10on = new Image(); menu10on.src = "histmenu/from_b.gif";
           menu11= new Image(); menu11.src = "histmenu/tobacco_a.gif"; 
           menu11on = new Image(); menu11on.src = "histmenu/tobacco_b.gif";
           menu12= new Image(); menu12.src = "histmenu/abuses_a.gif"; 
           menu12on = new Image(); menu12on.src = "histmenu/abuses_b.gif";
           menu13= new Image(); menu13.src = "histmenu/reforms_a.gif"; 
           menu13on = new Image(); menu13on.src = "histmenu/reforms_b.gif";
           menu14= new Image(); menu14.src = "histmenu/more_a.gif"; 
           menu14on = new Image(); menu14on.src = "histmenu/more_b.gif";
           menu15= new Image(); menu15.src = "histmenu/yoke_a.gif"; 
           menu15on = new Image(); menu15on.src = "histmenu/yoke_b.gif";
      }

      function swap(imgName,select) 
      { if (browser == "ok") {imgOn = eval(select+ ".src"); 
      document.images[imgName].src = imgOn; }}