function validate_email(field,alerttxt){
	with (field){
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2){
			alert(alerttxt);
			return false;
		}else{
			return true;
		}
	}
}

function validate_form(thisform){
	with (thisform){
		if (validate_email(email,"Not a valid e-mail address!") == false){
			email.focus();
			return false;
		}
	}
}