if (document.images){
   gomb1_2=new Image(103,94);
   gomb1_2.src="img/gomb1_2.jpg";
   gomb1_1=new Image(103,94);
   gomb1_1.src="img/gomb1_1.jpg";

   gomb2_2=new Image(103,94);
   gomb2_2.src="img/gomb2_2.jpg";
   gomb2_1=new Image(103,94);
   gomb2_1.src="img/gomb2_1.jpg";

   gomb3_2=new Image(103,94);
   gomb3_2.src="img/gomb3_2.jpg";
   gomb3_1=new Image(103,94);
   gomb3_1.src="img/gomb3_1.jpg";

   gomb4_2=new Image(103,94);
   gomb4_2.src="img/gomb4_2.jpg";
   gomb4_1=new Image(103,94);
   gomb4_1.src="img/gomb4_1.jpg";
}

function be(gombname){
   if (document.images){
      document.images[gombname].src=eval(gombname + "_2.src");
   }
}

function ki(gombname){
   if(document.images){
      document.images[gombname].src=eval(gombname + "_1.src");
   }
}