Browser_Name = navigator.appName;
   Browser_Ver  = parseInt(navigator.appVersion);
   if((Browser_Name == "Netscape" && Browser_Ver >= 3) || (Browser_Name == "Microsoft Internet Explorer" && Browser_Ver >= 4)) Browser_Gen = ">=3rd";
   else Browser_Gen = "<3rd";

   if (Browser_Gen == '>=3rd') {
   

   num_of_slides = 17; 
   slide_num = 1; 

   desc1 = "1";
   desc2 = "2";
   desc3 = "3";
   desc4 = "4";
   desc5 = "5";
   }


   function firstslide(){
     slide_num = 1;
     changeslide();
   }
   function prevslide(){
     slide_num = slide_num - 1;
     if(slide_num < 1){
       slide_num = num_of_slides;
     }
     changeslide();
   }
   function nextslide(){
     slide_num = slide_num + 1;
     if(slide_num > num_of_slides){
       slide_num = 1
     }
     changeslide();
   }
   function lastslide(){
     slide_num = 17;
     changeslide();
   }


   function changeslide(){        

     eval('document.picbox.src = "images/26-42/venor_rights_presentation' + slide_num + '.gif"');

 
   }