$(function(){
  // Document is ready  
  
  var body_height=$(window).height();
  var div_body_height=$('#body').height();
  var min_div_body_height=1172;
  
  if(div_body_height<body_height){
	  $('#body').css({'height': body_height});
  }  
  if(body_height<=min_div_body_height){
	  $('#body').css({'height': min_div_body_height});
  }
  
});