/*  ---------------- skripty pro menu --------------- */

function change_left_menu1(ID,stav) {
var ML = "ML1_" + ID;
var elementML = document.getElementById(ML);
if (elementML.style.display == "" && stav == "_hide") elementML.style.display = "none";
if (elementML.style.display == "" && stav == "_show") elementML.style.display = "block";
if (elementML.style.display == "block") elementML.style.display = "none";else elementML.style.display = "block";
}

/* --------------------------------------------------- */



function index_centering()
{
var index_div = document.getElementById("index_center");
var vyskaOkna = document.documentElement.clientHeight;
var margin = (vyskaOkna - 430) / 2;
index_div.style.margin = margin + "px auto";
}


function clear_pole_search ()
{
var input = document.getElementById("search_text");
input.value = "";
}