function popup(data,width,height) {
    var winwidth = (screen.width - width) / 2;
    var winheight = (screen.height - height) / 2;
    Neufenster2=window.open(data,"Zweitfenster2","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,top="+winheight+",left="+winwidth+",height="+height+",width="+width); 
 		setTimeout('Neufenster2.focus();',250);
}

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];
		}
	}
}

function check_email(address) {
  if ((address == "")
    || (address.indexOf ('@') == -1)
    || (address.indexOf ('.') == -1))
      return false;
  return true;
}

function chkFormularKontakt() {
  if(document.FormularKontakt.message.value == "") {
    alert("Bitte geben Sie eine Nachricht ein.");
    document.FormularKontakt.message.focus();
    return false;
  }
  if(document.FormularKontakt.Anrede[0].checked == false && document.FormularKontakt.Anrede[1].checked == false) {
    alert("Bitte geben Sie die gewünschte Anrede ein.");
    return false;
  }	
  if(document.FormularKontakt.vorname.value == "") {
    alert("Bitte geben Sie Ihren Vorname ein.");
    document.FormularKontakt.vorname.focus();
    return false;
  }
  if(document.FormularKontakt.nachname.value == "") {
    alert("Bitte geben Sie Ihren Nachname ein.");
    document.FormularKontakt.nachname.focus();
    return false;
  }
  if(document.FormularKontakt.email.value == "") {
    alert("Bitte geben Sie Ihre eMail-Adresse ein.");
    document.FormularKontakt.email.focus();
    return false;
  }
	if (!check_email(document.FormularKontakt.email.value)) {
		validity = false; alert('eMail-Adresse ist ungültig!');
    document.FormularKontakt.email.focus();
    return false;	
	}
}

function chkFormularGutschein() {
  if(document.FormularGutschein.emailgut.value == "") {
    alert("Bitte geben Sie Ihre eMail-Adresse ein.");
    document.FormularGutschein.emailgut.focus();
    return false;
  }
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		top_nav_1_over = newImage("images/nav_klinik-stuttgart_s.gif");
		top_nav_2_over = newImage("images/nav_brust_s.gif");
		top_nav_3_over = newImage("images/nav_koerper_s.gif");
		top_nav_4_over = newImage("images/nav_gesicht_s.gif");
		top_nav_5_over = newImage("images/nav_aktuell_s.gif");
		top_nav_6_over = newImage("images/nav_kontakt_s.gif");				
		preloadFlag = true;
	}
}

// FORMULAR Routenplaner abprüfen
function checkRoute() {
	with (document.webderoute2) {
	if ((fromstreet.value == "Str.") || (fromstreet.value == ""))  {
		alert("Bitte tragen Sie eine Straße ein.");
		fromstreet.select();
		fromstreet.focus();
		return false;
	}
	if ((fromplz.value == "PLZ") || (fromplz.value == "")) {
		alert("Bitte tragen Sie eine PLZ ein.");
		fromplz.select();
		fromplz.focus();
		return false;
	}
	if ((fromcity.value == "Ort") || (fromcity.value == "")) {
		alert("Bitte tragen Sie einen Ort ein.");
		fromcity.select();
		fromcity.focus();
		return false;
		}
	}
}

// Popup Box
var ns4=document.layers
var ie4=document.all
var ns6=document.getElementById&&!document.all

// drag drop function for NS 4
var dragswitch=0
var nsx
var nsy
var nstemp

function drag_dropns(name){
if (!ns4)
return
temp=eval(name)
temp.captureEvents(Event.MOUSEDOWN | Event.MOUSEUP)
temp.onmousedown=gons
temp.onmousemove=dragns
temp.onmouseup=stopns
}

function gons(e){
temp.captureEvents(Event.MOUSEMOVE)
nsx=e.x
nsy=e.y
}
function dragns(e){
if (dragswitch==1){
temp.moveBy(e.x-nsx,e.y-nsy)
return false
}
}

function stopns(){
temp.releaseEvents(Event.MOUSEMOVE)
}

// drag drop function for ie4+ and NS6
function drag_drop(e){
if (ie4&&dragapproved){
crossobj.style.left=tempx+event.clientX-offsetx
crossobj.style.top=tempy+event.clientY-offsety
return false
}
else if (ns6&&dragapproved){
crossobj.style.left=tempx+e.clientX-offsetx
crossobj.style.top=tempy+e.clientY-offsety
return false
}
}

function initializedrag(e){
crossobj=ns6? document.getElementById("showimage") : document.all.showimage

var firedobj=ns6? e.target : event.srcElement
var topelement=ns6? "HTML" : "BODY"

while (firedobj.tagName!=topelement&&firedobj.id!="dragbar"){
firedobj=ns6? firedobj.parentNode : firedobj.parentElement
}

if (firedobj.id=="dragbar"){
offsetx=ie4? event.clientX : e.clientX
offsety=ie4? event.clientY : e.clientY

tempx=parseInt(crossobj.style.left)
tempy=parseInt(crossobj.style.top)

dragapproved=true
document.onmousemove=drag_drop
}
}
document.onmousedown=initializedrag
document.onmouseup=new Function("dragapproved=false")

// drag drop functions end here
function hidebox(){
if (ie4||ns6)
crossobj.style.visibility="hidden"
else if (ns4)
document.showimage.visibility="hide"
}