gistfile1.txt

$(document).ready(function(){
  // Cache the Window object
  $window = $(window);
                
   $('div[data-type="background"]').each(function(){
    var $bgobj = $(this); // assigning the object
    var i = 0;
 
      $(window).scroll(function() {
        
        if($('.jokuclassi:in-viewport').length > 0 && i == 0 ) {
          
          var i = 1;
          var yPos = jotain;
        }
 
        else {
          
          var i = 0;
		      // Scroll the background at var speed
		      // the yPos is a negative value because we're scrolling it UP!								
		      var yPos = -($window.scrollTop() / $bgobj.data('speed')); 
		
        }
 
		    // Put together our final background position
		    var coords = '50% '+ yPos + 'px';
 
		    // Move the background
		$bgobj.css({ backgroundPosition: coords });
		
}); // window scroll Ends
 
 });	
 
}); 
 
/* 
 * Create HTML5 elements for IE's sake
 */
 
document.createElement("article");
document.createElement("section");