// validate.js
//
// Copyright 2007 Elephant's Task LLC
//
// validateForm() function :
// 	Checks to see that the required form elements are present
//	and in an acceptable state. 

function foo() {
	alert( "Foo");
	return false;
}

function validateForm() {

		var msgStr = "<p>Please correct the following: <br />";
				var isInValid = false;
	
				var name = document.frmSubmit.Name;
				if ( name && name.value == "" ) {
					msgStr = msgStr + "Please include your name.<br />";
					isInValid = true;
				}
	
				var email = document.frmSubmit.Email;
				if ( email && !isValidEmail( email.value )) {
					msgStr = msgStr + "Please include a valid email address.<br />";
					isInValid = true;
				}
				
				var comment = document.frmSubmit.Comment;
				if ( comment && comment.value == "" ) {
					msgStr = msgStr + "The message field appears empty.<br />";
					isInValid = true;
				}

				var phone = document.frmSubmit.Phone;
				if ( phone != null && phone.value != "" ) {
					if (!isValidPhone(phone.value)) {
						msgStr = msgStr + "Please provide digits and use the phone format shown.<br />";
						isInValid = true;
					}
				}
				
				if ( isInValid ) {
					var msgDiv = document.getElementById("messages");
					msgDiv.innerHTML = msgStr + "</p>";
					return false;
				} else {
					return true;
				}


}



function isValidEmail( str ) {

	if ( str.length <= 5 ) {
		return false;
	}

	var at = "@";
	var dot = ".";
	var in_at = str.indexOf(at);
	var in_dot = str.indexOf(dot);
	
	if ( in_at < 1 || in_dot < 3 ) {
		return false;
	}
	
	if ( str.substring( in_at + 1, in_at + 2 ) == dot ) {
		return false;
	}
	
	if ( str.substring( in_at - 1, in_at ) == dot ) {
		return false;
	}
	
	if ( str.indexOf( at, in_at + 1 ) != -1 ) {
		return false;
	}
	return true;
}

function isValidPhone( str ) {
	var pattern = /^\(\d{3}\) \d{3} - \d{4}$/;
	if (pattern.test( str )) {
		return true;
	}
	return false;
}