function swap(this_img, this_caption)  {
	var caption = document.getElementById('caption');
	var img = document.getElementById('img');

	img.src = this_img;
	caption.innerHTML = this_caption;
}
function fill() {
	if (document.subscribe.email.value == "")	{
		document.subscribe.email.value = "Enter your email";
	}
}
function remove() {
	if (document.subscribe.email.value == "Enter your email") {
		document.subscribe.email.value = "";
	}
}