function clearBox(input) {
	if(input.value=input.defaultValue) {
		input.value = '';	
	}
}

function resetBox(input) {
	if(!input.value) {
		input.value = input.defaultValue;	
	}
}

function validateEmail(email){
	var myEmail = email.value;

	if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(myEmail))){
		alert('Please enter a valid email address');
		return false;
	}

	return true;
}

function loadMap() {
  if (GBrowserIsCompatible()) {
		var map = new GMap2(document.getElementById("map"));
		var point = new GLatLng(53.36712, -1.50513);
		
		map.addControl(new GSmallMapControl());
		map.addControl(new GMapTypeControl());
		map.setCenter(point, 15);
	
		function createMarker(point, html) {
			var marker = new GMarker(point);
			GEvent.addListener(marker, "click", function() {
			marker.openInfoWindowHtml(html);
			});
			return marker;
		}
	
		map.addOverlay(createMarker(point, '<strong>Hallamshire Tennis & Squash Club Ltd.</strong><br />716 Ecclesall Road,<br />Sheffield.<br />South Yorkshire<br />S11 8TA'));

  }
}