userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
        if (document.images) {
                rslt = new Image();
                rslt.src = arg;
                return rslt;
        }
}
function changeImages() {
        if (document.images && (preloadFlag == true)) {
                var img;
                for (var i=0; i<changeImages.arguments.length; i+=2) {
                        img = null;
                        if (document.layers) {
                                img = findElement(changeImages.arguments[i],0);
                        }
                        else {
                                img = document.images[changeImages.arguments[i]];
                        }
                        if (img) {
                                img.src = changeImages.arguments[i+1];
                        }
                }
        }
}

var preloadFlag = false;
function preloadImages() {
        if (document.images) {
                sprechzeiten_over = newImage("images/sprechzeiten-over.gif");
                leistungen_over = newImage("images/leistungen-over.gif");
                team_over = newImage("images/team-over.gif");
                notruf_over = newImage("images/notruf-over.gif");
                impressum_over = newImage("images/impressum-over.gif");
                preloadFlag = true;
        }
}

function changePic(pic_file)
{
        if(pic_file=='pic_impressum.jpg') document.getElementById('pic').useMap = "#map";
                else document.getElementById('pic').useMap = "#nomap";
        document.getElementById('pic').src = "images/"+pic_file;
}