function deliveryOptions(){
  if(!degradeByScript()) {return false;}
  if(!degradeByIDs(new Array("delivery_id", "shipping_form"))) {return false;}
  
  var selectionBox = document.getElementById("delivery_id");
	selectionBox.onchange = function(){
		if (!document.getElementById("shipping_form")) return false;
		
		//Error Handling
		if(!this.options) { return false; }
		
		//Submit
		var shipping_form = document.getElementById("shipping_form");
		shipping_form.submit();
	}
}
addLoadEvent(deliveryOptions);