function id(t)
{
   if (t=="id")
      b=["graf/id_1.png","graf/id_2.png","graf/id_3.png","graf/id_4.png"];
   p=b.length;
   n=Math.round(Math.random()*(p-1));
   v=b[n].split("#");
   v_src=v[0];v_url=v[1];
   document.write(''+'<IMG SRC="'+v_src+'" BORDER="0">');
}