image1= new Image();
 image1.src = "../buttons/b_09_01_proj_a.gif";
 image1on = new Image();
 image1on.src = "../buttons/b_09_01_proj_b.gif";
 image2= new Image();
 image2.src = "../buttons/b_09_02_kont_a.gif";
 image2on = new Image();
 image2on.src = "../buttons/b_09_02_kont_b.gif";
 image3= new Image();
 image3.src = "../buttons/b_09_03_impr_a.gif";
 image3on = new Image();
 image3on.src = "../buttons/b_09_03_impr_b.gif";



 function on(name)   {
         document[name].src = eval(name + "on.src");
 }
 function off(name)  {
         document[name].src = eval(name + ".src");
 }