function repositioning(){

  size = browserWindowSize();
  if(size[1]<675){

    document.getElementById('container').style.top='0%';
    document.getElementById('container').style.marginTop='15px'; 
    document.getElementById('container').style.marginBottom='15px';   
  }
}

function initResize(){
  window.setTimeout('repositioning()', 200);
  window.setTimeout('repositioning()', 500);
  window.setTimeout('repositioning()', 800);  
  window.setTimeout('repositioning()', 1500);
}
window.onResize = initResize()