function changeSpan(span,change){
	var style = getStyleObject(span);
	if(style != false){
		style.display = change;
	}
}

function hideAll(){
	changeSpan("states","none");
	changeSpan("provinces","none");
}

function getStyleObject(objectId){
	if(document.getElementById && document.getElementById(objectId)){
		return document.getElementById(objectId).style;
	}
	else if(document.all && document.all(objectId)){
		return document.all(objectId).style;
	}
	else{
		return false;
	}
}

function setCountry(chosen){
	if(chosen == "United States of America"){
		hideAll();
		changeSpan('states','block');
	}
	else if(chosen == "Canada"){
		hideAll();
		changeSpan('provinces','block');
	}
	else{
		hideAll();
	}
}