function showInfo(act){

    div_exists = new Array("main","1","2","3","4");

    for(var i=0; i<div_exists.length;++i){

     if(act==div_exists[i]) {
       document.getElementById(act).style.visibility = "visible";

     }
     else
       document.getElementById(div_exists[i]).style.visibility = "hidden";

   }

}

function printWindow(win) {

   windi = window.open(win,"Druckversion","width=400,height=600,left=0,top=0,resizable=yes,scrollbars=yes");
    windi.focus();
    windi.print();
    }



function openWindow(win) {

   windi = window.open(win,"test","width=400,height=400,left=0,top=0");
    windi.focus();
    }

function showMain(){

      if(document.getElementById('main'))
       document.getElementById('main').style.visibility = "visible";


    if(document.getElementById('pic'))
       document.getElementById('pic').style.visibility = "hidden";

}

function showPic(){

      document.getElementById('main').style.visibility = "hidden";
      document.getElementById('pic').style.visibility = "visible";

}