$('html').addClass('js');
$(window).load(function() {
  $('html').removeClass('js');
});

var positionBackground = function() {
 if ($(window).height() < 560) {
  $('body').css({'background-attachment' : 'scroll', 'background-position' : 'top center'});
 }
 else {
  $('body').css({'background-attachment' : 'fixed', 'background-position' : 'bottom center'});	
 }		
}

$(document).ready(function() {
 positionBackground();
 $('textarea').growfield();   
});	
$(window).resize(function() {
 positionBackground();
});