docs: function collides(element_one, element_two) {
  
  	var result,
  	    rect1,
  	    rect2;
  
  	if (element_one.nodeName) {
  		rect1 = element_one.getBoundingClientRect();
  	} else {
  		rect1 = element_one;
  	}
  
  	if (element_two.nodeName) {
  		rect2 = element_two.getBoundingClientRect();
  	} else {
  		rect2 = element_two;
  	}
  
  	result = !(
  		rect1.top    > rect2.bottom ||
  		rect1.right  < rect2.left ||
  		rect1.bottom < rect2.top ||
  		rect1.left   > rect2.right
  	);
  
  	return result;
  }