function change_icon(x,y)
{
switch (x)
{
 case '1':
     {
         if (y == "0")
         {
           window.menu1.className = "menuover";
         }
         else
         {
           window.menu1.className = "menu";
         }
         break ;
     }

 case '2':
     {
         if (y == "0")
         {
           window.menu2.className = "menuover";
         }
         else
         {
           window.menu2.className = "menu";
         }
         break ;
     }

 case '3':
     {
         if (y == "0")
         {
           window.menu3.className = "menuover";
         }
         else
         {
           window.menu3.className = "menu";
         }
         break ;
     }

 case '4':
     {
         if (y == "0")
         {
           window.menu4.className = "menuover";
         }
         else
         {
           window.menu4.className = "menu";
         }
         break ;
     }

 case '5':
     {
         if (y == "0")
         {
           window.menu5.className = "menuover";
         }
         else
         {
           window.menu5.className = "menu";
         }
         break ;
     }

 case '6':
     {
         if (y == "0")
         {
           window.menu6.className = "menuover";
         }
         else
         {
           window.menu6.className = "menu";
         }
         break ;
     }

 case '7':
     {
         if (y == "0")
         {
           window.menu7.className = "menuover";
         }
         else
         {
           window.menu7.className = "menu";
         }
         break ;
     }


 case '8':
     {
         if (y == "0")
         {
           window.document.all.img8.src="images/8.gif";
         }
         else
         {
         window.document.all.img8.src="images/8g.gif";
         }
         break ;
     }

 case '9':
     {
         if (y == "0")
         {
           window.document.all.img9.src="images/9.gif";
         }
         else
         {
         window.document.all.img9.src="images/9g.gif";
         }
         break ;
     }

 case '10':
     {
         if (y == "0")
         {
           window.document.all.img10.src="images/10.gif";
         }
         else
         {
         window.document.all.img10.src="images/10g.gif";
         }
         break ;
     }

 case '11':
     {
         if (y == "0")
         {
           window.document.all.img11.src="images/11.gif";
         }
         else
         {
         window.document.all.img11.src="images/11g.gif";
         }
         break ;
     }

 case '12':
     {
         if (y == "0")
         {
           window.document.all.img12.src="images/12.gif";
         }
         else
         {
         window.document.all.img12.src="images/12g.gif";
         }
         break ;
     }

 case '13':
     {
         if (y == "0")
         {
           window.document.all.img13.src="images/13.gif";
         }
         else
         {
         window.document.all.img13.src="images/13g.gif";
         }
         break ;
     }

}
}