function checkemail (echeck){
	if (echeck.value.indexOf("@") != "-1" && echeck.value.indexOf(".") != "-1"){
		return true;
	}
	else{
		return false;
	}
}

function checkform (form){
	if  (checkemail(form.email) == false){
		alert("Please enter a valid email address.");
		form.email.focus( );
		return false;
	}
}