function on_obec(a)
{
 a.src="images/button2_obec.gif";
 document.getElementById("index_obec_content").style.visibility = "visible";
}

function off_obec(a)
{
 a.src="images/button1.gif";
 document.getElementById("index_obec_content").style.visibility = "hidden";
}

function on_ou(a)
{
 a.src="images/button2_ou.gif";
 document.getElementById("index_ou_content").style.visibility = "visible";
}

function off_ou(a)
{
 a.src="images/button1.gif";
 document.getElementById("index_ou_content").style.visibility = "hidden";
}

function on_info(a)
{
 a.src="images/button2_info.gif";
 document.getElementById("index_info_content").style.visibility = "visible";
}

function off_info(a)
{
 a.src="images/button1.gif";
 document.getElementById("index_info_content").style.visibility = "hidden";
}

created = 0
function wOpen(obr,w,h) 
{
 if (created) 
 {
    myWin.close()
    if (myWin == null)
    {
       created = 0
    }
 }
  myWin = window.open(obr,'foto','toolbar=0,location=0,directories=0,status=0,menubar=0' + ',scrollbars=0,resizable=0,copyhistory=0' + ',leftmargin=0,topmargin=0' + ',width=' + w + ',height=' + h)
//  this.myRealWin = window.open(this.url,'foto') 
  created = 1
}