function activeShow(my_id) {
 if(typeof(my_id)==undefined) {return;}
 myshow1 = (verze.substr(0,2)=="op" || verze.substr(0,2)=="ns" || verze.substr(0,2)=="mo" || verze.substr(0,2)=="go") ? "table-row" : "block";
 myshow2 = (verze.substr(0,2)=="op" || verze.substr(0,2)=="ns" || verze.substr(0,2)=="mo" || verze.substr(0,2)=="go") ? "table-cell" : "block";
 rightID = new Array("karta", "mapa", "pobocka", "nastenka");						// možné hodnoty ID
 for(var index = 0; index < rightID.length; ++index) {
	 if(document.getElementById(rightID[index])) {
   document.getElementById(rightID[index]).style.display = rightID[index]==my_id ? myshow1 : "none";
   document.getElementById("td1_"+rightID[index]).style.display = rightID[index]==my_id ? "none" : myshow2;
   document.getElementById("td2_"+rightID[index]).style.display = rightID[index]==my_id ? "none" : myshow2;
 }}
 document.getElementById("items").width = my_id==rightID[0] ? "25%" : "50%";
// musí to tady být 2x kvůli Opeře (jinak se špatně nastaví šířka sloupců)
 document.getElementById("items").style.display = "none";
 document.getElementById("items").style.display = "";
 document.getElementById("sloupec").valign = my_id==rightID[0] ? "top" : "middle";
 if(document.getElementById("reklama3")) {
  document.getElementById("reklama3").style.display = "";
 }
 if(document.getElementById("left")) {
  document.getElementById("left").style.display = my_id==rightID[0] ? myshow2 : "none";
  document.getElementById("leftsymbol").innerHTML = "<-";
 }
}

function leftShow() {
	show = document.getElementById("items").style.display=="none";
	show_disp = show ? "" : "none";
	show_char = show ? "<-" : "->";
 document.getElementById("items").style.display = show_disp;
 if(document.getElementById("reklama3")) {
  document.getElementById("reklama3").style.display = show_disp;
 }
 document.getElementById("leftsymbol").innerHTML = show_char;
}