function isValidEmail(address) {
	//trim whitespace from start of email
	while (address.substring(0,1) == ' ') {
		address = address.substring(1, address.length);
	}
	//trim whitespace from end of email
	while (address.substring(address.length-1, address.length) == ' ') {
		address = address.substring(0,address.length-1);
	}
	if (address.indexOf('@')==-1 || address.indexOf(' ')>=0 || address.length<8) {
		alert("Please enter a valid email address");
		return false;
	}
	return true;
}


/*Original function to validate email address
function isValidEmail(address) {
	if (address.indexOf('@')==-1 || address.indexOf(' ')>=0 || address.length<8) {
		alert("Please enter a valid email address");
		return false;
	}
	return true;
}*/