function Toggle(item) {
   obj=document.getElementById(item);
   visible=(obj.style.display!="none")
   key=document.getElementById("x" + item);
   if (visible) {
     obj.style.display="none";
     key.innerHTML="·";
   } else {
      obj.style.display="block";
      key.innerHTML="·";
   }
}

function Expand() {
   divs=document.getElementsByTagName("DIV");
   for (i=0;i<divs.length;i++) {
     divs[i].style.display="block";
     key=document.getElementById("x" + divs[i].id);
     key.innerHTML="&middot;";
   }
}

function Collapse() {
   divs=document.getElementsByTagName("DIV");
   for (i=0;i<divs.length;i++) {
     divs[i].style.display="none";
     key=document.getElementById("x" + divs[i].id);
     key.innerHTML="&middot;";
   }
}
function OpenPictureWindow(theURL,winName,x,y) { 
vyska = screen.height;
sirka = screen.width;
var levy = (sirka - x)/2;
var horni = (vyska - y)/2;
window.open(theURL,winName,"width="+x+",height="+y+",left="+levy+",top="+horni);
}