function validate_form(element){
	var emailRegxp = /^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/;
	var email = document.getElementById(element).value;
	if (emailRegxp.test(email) != true){
		alert('Please enter a valid email');
		return false;
	}
}