var BTWindow;

function launchBusyThings() {
	if(BTWindow) {
		BTWindow.close();
	}
	var f = "toolbar=no,menubar=no,scrollbars=no,resizable=yes,location=no,directories=no,status=no";
	f+= ",width=" + screen.width;
	f+= ",height=" + screen.height;
	BTWindow = window.open("BusyThings.php", "_blank", f);
	BTWindow.moveTo(0, 0);	
}

function launchBusyThingsActivity(tag) {
	if(BTWindow) {
		BTWindow.close();
	}
	var f = "toolbar=no,menubar=no,scrollbars=no,resizable=yes,location=no,directories=no,status=no";
	f+= ",width=" + screen.width;
	f+= ",height=" + screen.height;
	BTWindow = window.open("BusyThings.php?activity=" + tag, "_blank", f);
	BTWindow.moveTo(0, 0);	
}

function launchBusyThingsDemo() {
	if(BTWindow) {
		BTWindow.close();
	}
	var f = "toolbar=no,menubar=no,scrollbars=no,resizable=yes,location=no,directories=no,status=no";
	f+= ",width=" + screen.width;
	f+= ",height=" + screen.height;
	BTWindow = window.open("BusyThingsDemo.php", "_blank", f);
	BTWindow.moveTo(0, 0);	
}

function validateForm(frm) {
	with(frm) {
		var items = ["firstname", "surname", "school", "address1", "postcode", "email", "telephone"];
		var names = ["First name", "Surname", "School", "Address", "Postcode", "E-mail address", "Telephone number"];
		for(var i = 0; i < items.length; i++) {
			var val = frm[items[i]].value;
			if(val == null || val == "") {				
				alert("Please enter a valid " + names[i] + ".");
				return false;
			}
		}
		if(!((email.value.indexOf(".") >= 0) && (email.value.indexOf("@") > 0))) {
			alert("Please enter a valid E-mail address.");
			return false;
		}

	}
	return true
	
}