waypoint-scroll-toggle.js

var discreteElements = document.getElementsByClassName('sticky-frame')
	for (var i = 0; i < discreteElements.length; i++) {
		new Waypoint({
			element: discreteElements[i],
			handler: function(direction) {
        if ( direction == 'down' ) 
  				this.element.classList.add('stuck');
        else 
          this.element.classList.remove('stuck');
			},
//			context: document.getElementById('page-content'),
			offset: '0%'
		});
		new Waypoint({
			element: discreteElements[i],
			handler: function(direction) {
        if ( direction == 'down' ) 
  				this.element.classList.remove('stuck');
        else 
          this.element.classList.add('stuck');
			},
//			context: document.getElementById('page-content'),
			offset: 'bottom-in-view'
		});
  
  }