brotherton-erpnext/website/templates/html/footer.html

<footer class="container"><div class="web-footer">
	{% if facebook_share or google_plus_one or twitter_share or linked_in_share %}
	<div class="social-icons" style="">
		<span style="font-size: 11px;">{{ share_text or "Share this page on: "}}</span>
		{% if google_plus_one %}
			<a href="https://plus.google.com/share?url={{ url }}"
			 	target="_blank"><i class="icon-google-plus"></i></a>
		{% endif %}
		{% if twitter_share %}
			<a href="https://twitter.com/intent/tweet?url={{ url }}&text={{ encoded_title }}"
				target="_blank" ><i class="icon-twitter"></i></a>
		{% endif %}
		{% if facebook_share %}
			<a href="https://www.facebook.com/sharer.php?u={{ url }}&t={{ encoded_title }}&via={{ twitter_share_via }}"
				target="_blank"><i class="icon-facebook"></i></a>
		{% endif %}
		{% if linked_in_share %}
			<a href="http://www.linkedin.com/shareArticle?mini=true&url={{ url }}&title={{ encoded_title }}"
				target="_blank"><i class="icon-linkedin"></i></a>
		{% endif %}
	</div>
	{% endif %}
	<p style="float: right; clear: right;">
		<a style="font-size: 90%; color: #888;" href="attributions">ERPNext Powered</a>
	</p>
	<div class="web-footer-menu">
	<ul>
		{% for item in footer_items %}
		<li><a href="{{ item.url }}" {{ item.target }}
			data-label="{{ item.label }}">{{ item.label }}</a></li>
		{% endfor %}
	</ul>
	</div>
	{% if copyright %}
	<div class="web-footer-copyright">&copy; {{ copyright }}</div>
	{% endif %}
	{% if address %}
	{{ address }}
	{% endif %}
	<p><div class="input-append" style="text-align: center; margin:30px 0px;">
	  <input class="col-span-3" id="footer-subscribe-email" type="text" placeholder="Your email address...">
	  <button class="btn" type="button" id="footer-subscribe-button">Stay Updated</button>
	</div></p>
	<script>
		$("#footer-subscribe-button").click(function() {

			$("#footer-subscribe-email").attr('disabled', true);
			$("#footer-subscribe-button").html("Sending...")
				.attr("disabled", true);

			if($("#footer-subscribe-email").val()) {
				erpnext.send_message({
					subject:"Subscribe me",
					sender: $("#footer-subscribe-email").val(),
					message: "Subscribe to newsletter (via website footer).",
					callback: function(r) {
						if(!r.exc) {
							$("#footer-subscribe-button").html("Thank You :)")
								.addClass("btn-success").attr("disabled", true);
						} else {
							$("#footer-subscribe-button").html("Error :( Not a valid id?")
								.addClass("btn-danger").attr("disabled", false);
							$("#footer-subscribe-email").val("").attr('disabled', false);
						}
					}
				});
			}
		});
	</script>
	</div>
</footer>