function test() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement
                    && ( document.documentElement.clientWidth
                    || document.documentElement.clientHeight ) ) {
    //IE 6+ in standards compliant mode;
               myWidth = document.documentElement.clientWidth;
               myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
                myWidth = document.body.clientWidth;
                myHeight = document.body.clientHeight;
  }
  return myHeight;
}

function contentWysokosc() {
	wysokosc=test();
	document.getElementById('content').style.height=(wysokosc-260)+'px';
	document.getElementById('contentText').style.height=(wysokosc-330)+'px';
}