function checkForm(f){
	msg=[];
	r=/^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
	ret=(r.test(f.email_emailaddress.value)&&f.email_emailaddress.value!='')?true:false;
	if(!ret){
		msg.push("The email address is invalid");
	}
	if (f.email_name.value.split(" ").join("") == ""){
		ret=false;
		msg.push("Please enter your name");
	}
	if (ret == false){
		alert(msg.join(".\n")+".");
	}
	return ret;
}
function checkRegisterForm(f){
	msg=[];
	r=/^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
	ret=(r.test(f.register_emailaddress.value)&&f.register_emailaddress.value!='')?true:false;
	if(!ret){
		msg.push("The email address is invalid");
	}
	if (ret == false){
		alert(msg.join(".\n")+".");
	}
	return ret;
}