var activeMenu;
var positions = new Array(-100,179,209,239,269,299,329,359,389,299,299,299,299,299,299);

function init(num) {

        activeMenu = num;
        active(num);

}

function submenu(toggle){

  if(toggle) {
                 document.getElementById("menu4").src = "images/menu_bauvorh_hover.gif";
                 document.getElementById("menu5").src = "images/menu_praesentationen_hover.gif";
                 document.getElementById("submenu_div").style.display = "block";
                 active('5');
         } else {
                 document.getElementById("menu4").src = "images/menu_bauvorh.gif";
                 document.getElementById("menu5").src = "images/menu_praesentationen.gif";
                 document.getElementById("submenu_div").style.display = "none";
                 active(activeMenu);
         }

}

function active(num) {

        if(num < 1 || num > 14) num = 0;

        document.getElementById("active").style.top = positions[num] + "px";

}

function emptyform() {

         document.getElementsByName('vorname')[0].value = '';
         document.getElementsByName('nachname')[0].value = '';
         document.getElementsByName('firma')[0].value = '';
         document.getElementsByName('mail')[0].value = '';
         document.getElementsByName('nachricht')[0].value = '';

}

function magnify(a) {

         setcookie("file", a);

         newwidth = "530";
         newheight = "550";

         window.open("magnify.html", "magnify", "location=no, toolbar=no, scrollbars=no, statusbar=no, status=no resizable=no, width=" + newwidth + ", height=" + newheight);
}

function getcookie(name) {
         var dc = document.cookie;
         var prefix = name + "=";
         var begin = dc.indexOf("; " + prefix);
         if (begin == -1) {
             begin = dc.indexOf(prefix);
             if (begin != 0) return 0;
         } else begin += 2;
         var end = document.cookie.indexOf(";", begin);
         if (end == -1) end = dc.length;
         return unescape(dc.substring(begin + prefix.length, end));
}

function setcookie(name, value) {
         document.cookie = name + "=" + value;
}

function delcookie() {
         var datum = new Date();
         var zeit = datum.getTime() - (3*24*60*60*1000);
         datum.setTime(zeit);
         document.cookie = "file=; expires=" + datum.toGMTString();
}

function loadfile() {
         var datei = getcookie("file");
         document.all.image.innerHTML = "<img src='" + datei + "' style='border:1px solid black;' onload='window.resizeTo(this.width + 40, this.height + 140)'>";
}