menu1_off= new Image();
menu1_off.src="./images/_ofirme_off.jpg";
menu1_on= new Image();
menu1_on.src="./images/_ofirme_on.jpg";

menu2_off= new Image();
menu2_off.src="./images/_aktualni_nabidka_off.jpg";
menu2_on= new Image();
menu2_on.src="./images/_aktualni_nabidka_on.jpg";

menu3_off= new Image();
menu3_off.src="./images/_sluzby_off.jpg";
menu3_on= new Image();
menu3_on.src="./images/_sluzby_on.jpg";

menu4_off= new Image();
menu4_off.src="./images/_kde_nas_najdete_off.jpg";
menu4_on= new Image();
menu4_on.src="./images/_kde_nas_najdete_on.jpg";

menu5_off= new Image();
menu5_off.src="./images/_prezentace_off.jpg";
menu5_on= new Image();
menu5_on.src="./images/_prezentace_on.jpg";


function ObrOpen(filename,width,height) {
    mywindow = window.open('','','width='+width+',height='+height);
    mywindow.moveTo(screen.width/2-width/2,screen.height/2-height/2);
    mywindow.location = './obrazek.php?filename='+filename;
  }

function getObj(name) {
  if (document.getElementById)
    {this.obj = document.getElementById(name);
    this.style = document.getElementById(name).style;}
  else if (document.all)
    {this.obj = document.all[name];
    this.style = document.all[name].style;}
  else if (document.layers)
    {this.obj = document.layers[name];
    this.style = document.layers[name];}
}

function hidestyle(whichid)
{
  mainobject = new getObj(whichid);
  if (mainobject.style.display=='none')
    {mainobject.style.display='';}
  else
    {mainobject.style.display='none';}
}
function hidestyleON(whichid)
{
  mainobject = new getObj(whichid);
  mainobject.style.display='none';
}

function hidestyleOFF(whichid)
{
  mainobject = new getObj(whichid);
  mainobject.style.display='';
}