var default_image = "";
var stary_kraj = 1;

function preload_images(map_number){
	var images = new Array;
	for (var mapNum = 0; mapNum < 15; mapNum++) {
		images[mapNum].src = '../images/mapy/map' + mapNum + '.png';
	}
	set_default_map(map_number);    
   return (images);
}

function set_default_map(map_number){
    default_image = map_number;
}

function swap_image_map(map_number){
    /*
    image_id = document.getElementById('czech_republic_map');
	 image_id.src = 'images/mapy/map' + map_number + '.png';
    image_id.style.cursor = 'pointer';
    */
}

function show_div(number){
    image_id = document.getElementById('czech_republic_map');
    image_id.src = 'images/mapy/map' + number + '.png';
    
    el = document.getElementById('kraj_'+stary_kraj);
    el.style.display = 'none';

    el = document.getElementById('kraj_'+number);
    stary_kraj = number;
    el.style.display = 'block';


    /*
    hide_div();
    div_id = document.getElementById('k' + number);
    div_id.style.display = 'block';
    set_default_map(number);
    alert ('sutu');

    */
    return false;
}

function hide_div(){
    for (i = 1; i < 15; i++) {
        try {
            div_id = document.getElementById('k' + i);
            div_id.style.display = 'none';
        } 
        catch (chyba) {
        }
    }
}

function GetXmlHttpObject() {
	var xmlHttp=null;
	try {xmlHttp=new XMLHttpRequest(); } // firefox, safari, opera
	catch (e) {
	  try {xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");} // msie
	  catch (e) {xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");}
   }
	return xmlHttp;
}

function stateChanged() {
	if (xmlHttp.readyState==4) {
		document.getElementById('mp').innerHTML=xmlHttp.responseText;
	}
}

function Zobraz() {
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {alert ("Your browser does not support AJAX!"); return; }
	url="./content.php";
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}