function showAlert() {
	var postcode = document.getElementById('postcode').value;
 	if (postcode == "")
	{
		alert("Please enter a postcode");
	}
	else
	{
		alert("A new tab will now open with directions from your postcode.");
		window.open("http://maps.google.com/maps?saddr=" + postcode + "&daddr=ne119dr");
	}
}

function blink(time, interval){
	var timer = window.setInterval(function(){
		$(".slideshow").css("background", "#a9bfd9");
		window.setTimeout(function(){
			$(".slideshow").css("background", "");
			}, 2000);}, interval);     
			window.setTimeout(function(){clearInterval(timer);}, time); }