function blocking(nr)
{
        if (document.layers)
        {
                current = (document.layers[nr].display == 'block') ? 'none' : 'block';
                document.layers[nr].display = current;
        }
        else if (document.all)
        {
                current = (document.all[nr].style.display == 'block') ? 'none' : 'block';
                document.all[nr].style.display = current;
        }
        else if (document.getElementById)
        {
                vista = (document.getElementById(nr).style.display == 'block') ? 'none' : 'block';
                document.getElementById(nr).style.display = vista;
        }
}

function newImage(arg) {
        if (document.images) {
                rslt = new Image();
                rslt.src = arg;
                return rslt;
        }
}

function changeImages() {
        if (document.images && (preloadFlag == true)) {
                for (var i=0; i<changeImages.arguments.length; i+=2) {
                        document[changeImages.arguments[i]].src = changeImages.arguments[i+1];

                }
        }
}

var preloadFlag = false;
function preloadImages() {
        if (document.images) {
                map_01_map_07_over = newImage("/images/map/g/map_01-map_07_over.gif");
                map_01_map_05_over = newImage("/images/map/g/map_01-map_05_over.gif");
                map_02_over = newImage("/images/map/g/map_02-over.gif");
                map_02_map_07_over = newImage("/images/map/g/map_02-map_07_over.gif");
                map_04_map_05_over = newImage("/images/map/g/map_04-map_05_over.gif");
                map_04_map_08_over = newImage("/images/map/g/map_04-map_08_over.gif");
                map_04_map_11_over = newImage("/images/map/g/map_04-map_11_over.gif");
                map_05_map_06_over = newImage("/images/map/g/map_05-map_06_over.gif");
                map_05_over = newImage("/images/map/g/map_05-over.gif");
                map_05_map_08_over = newImage("/images/map/g/map_05-map_08_over.gif");
                map_05_map_09_over = newImage("/images/map/g/map_05-map_09_over.gif");
                map_06_map_07_over = newImage("/images/map/g/map_06-map_07_over.gif");
                map_06_over = newImage("/images/map/g/map_06-over.gif");
                map_06_map_05_over = newImage("/images/map/g/map_06-map_05_over.gif");
                map_07_map_02_over = newImage("/images/map/g/map_07-map_02_over.gif");
                map_07_over = newImage("/images/map/g/map_07-over.gif");
                map_07_map_06_over = newImage("/images/map/g/map_07-map_06_over.gif");
                map_08_over = newImage("/images/map/g/map_08-over.gif");
                map_08_map_11_over = newImage("/images/map/g/map_08-map_11_over.gif");
                map_08_map_09_over = newImage("/images/map/g/map_08-map_09_over.gif");
                map_09_map_06_over = newImage("/images/map/g/map_09-map_06_over.gif");
                map_09_map_05_over = newImage("/images/map/g/map_09-map_05_over.gif");
                map_09_map_08_over = newImage("/images/map/g/map_09-map_08_over.gif");
                map_09_over = newImage("/images/map/g/map_09-over.gif");
                map_10_map_07_over = newImage("/images/map/g/map_10-map_07_over.gif");
                map_10_map_06_over = newImage("/images/map/g/map_10-map_06_over.gif");
                map_10_map_05_over = newImage("/images/map/g/map_10-map_05_over.gif");
                map_10_map_09_over = newImage("/images/map/g/map_10-map_09_over.gif");
                map_11_map_08_over = newImage("/images/map/g/map_11-map_08_over.gif");
                map_11_over = newImage("/images/map/g/map_11-over.gif");
                map_12_map_08_over = newImage("/images/map/g/map_12-map_08_over.gif");
                map_12_map_11_over = newImage("/images/map/g/map_12-map_11_over.gif");
                map_12_map_09_over = newImage("/images/map/g/map_12-map_09_over.gif");
                map_13_map_06_over = newImage("/images/map/g/map_13-map_06_over.gif");
                map_13_map_09_over = newImage("/images/map/g/map_13-map_09_over.gif");
                map_14_map_06_over = newImage("/images/map/g/map_14-map_06_over.gif");
                map_14_map_09_over = newImage("/images/map/g/map_14-map_09_over.gif");
                map_15_map_06_over = newImage("/images/map/g/map_15-map_06_over.gif");
                map_15_map_11_over = newImage("/images/map/g/map_15-map_11_over.gif");
                map_15_map_09_over = newImage("/images/map/g/map_15-map_09_over.gif");
                map_16_map_07_over = newImage("/images/map/g/map_16-map_07_over.gif");
                map_16_map_06_over = newImage("/images/map/g/map_16-map_06_over.gif");
                map_17_map_07_over = newImage("/images/map/g/map_17-map_07_over.gif");
                map_18_map_07_over = newImage("/images/map/g/map_18-map_07_over.gif");
                preloadFlag = true;
        }
}