//popups
//------
function OpenWin(breite,hoehe,url,name)
{
var x=screen.width;
var y=screen.height;
var offsetx=(x-breite)/2;
var offsety=(y-hoehe)/2;
var para="width="+breite+",height="+hoehe+",top="+offsety+",left="+offsetx;
para+=",scrolling=auto";
neuesFenster=window.open(url,name,para);
}

//preload der grafiken
//--------------------
function preloader()
 {
var i=0;
var pics=new Array(arguments.length);
  for(i=0;i<pics.length;i++)
  {
   pics[i]=new Image();
   pics[i].src=arguments[i];
  }
}

//bilderwechsel
//-------------
function rollover(bildname,bild)
{
if(document.images)
 {
 window.document.images[bildname].src=bild;
 }
}

//bildwechsel formular
//-------------
function image_roll(img_swap, img_name)
{
img_name.src = img_swap;
}

//formular check
//--------------
function check(enquiry)
{
if (enquiry.name.value == '' || enquiry.name.value == "name")
 {
 alert("please enter your name!");
 enquiry.name.focus();
 return false;
 }
if (enquiry.email.value == '')
 {
 alert("please enter your email address!!");
 enquiry.email.focus();
 return false;
 }
if ((enquiry.email.value.indexOf('@') == -1) || (enquiry.email.value.indexOf('.') == -1))
 {
 alert("please enter valid email address!");
 enquiry.email.focus();
 return false;
 }
if (enquiry.nachricht.value == '')
 {
 alert("please enter comment!");
 enquiry.nachricht.focus();
 return false;
 }
 return true;
}