function getHeight(){
  if(window.innerHeight) { 
   return window.innerHeight;
  } else if (document.documentElement&&document.documentElement.clientHeight){
   return document.documentElement.clientHeight;
  } else if (document.body) {
   return document.body.offsetHeight;
  }
} 
window.onresize = reDraw;
window.onload = reDraw; 

function reDraw(){
  height=getHeight();
  
  heightContainer = height-20;
  heightGallery = height-30;
  document.getElementById("head").style.height = heightContainer+"px";
  //document.getElementById("galleryTable").style.height = heightGallery+"px";
}