var viewportwidth;
 var viewportheight;

 // the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight

 if (typeof window.innerWidth != 'undefined')
 {
      viewportwidth = window.innerWidth,
      viewportheight = window.innerHeight
 }

// IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)
 else if (typeof document.documentElement != 'undefined'
    && typeof document.documentElement.clientWidth !=
     'undefined' && document.documentElement.clientWidth != 0)
 {
       viewportwidth = document.documentElement.clientWidth,
       viewportheight = document.documentElement.clientHeight 
 }

 // older versions of IE
 else
 {
       viewportwidth = document.body.clientWidth,
       viewportheight = document.body.clientHeight
 }

hoehe = viewportheight / 2
hoehe2 = hoehe - 245
hoehe3 = hoehe - 265
hoehe4 = hoehe - 240
hoehe5 = hoehe - 260
hoehe7 = hoehe - 245

breite = viewportwidth / 2
breite1 = breite - 285
breite2 = breite - 277
breite3 = breite - 283
breite4 = breite - 479
breite5 = breite - 269