function getWinHeight() {
   var myHeight = 0;
   if( typeof (window.innerWidth ) == 'number') {
      myHeight = window.innerHeight;
   } else if (document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight)) {
      myHeight = document.documentElement.clientHeight;
   } else if (document.body && ( document.body.clientWidth || document.body.clientHeight)) {
      myHeight = document.body.clientHeight;
   }
   return (myHeight);
}

window.onload = function() {
   var winHeight = getWinHeight();
   var elm = document.getElementById('content-wrapper');
   var contentHeight = elm.offsetHeight;
   
   if (contentHeight < winHeight) {
      contentHeight = winHeight - 140;
   }
   elm.style.height = ''+contentHeight+'px';
}