/* javascript for e catalog system 
   modified May 17, 2006
*/

function formValidation(){
	if (document.ecat.company.value.length == 0){
		alert("The 'Company/Organization' field is required.");
		document.ecat.company.focus();
		return false;
	}
	if (document.ecat.firstname.value.length == 0){
		alert("The 'First Name' field is required.");
		document.ecat.firstname.focus();
		return false;
	}
	if (document.ecat.lastname.value.length == 0){
		alert("The 'Last Name' field is required.");
		document.ecat.lastname.focus();
		return false;
	}
	if (document.ecat.email.value.length == 0){
		alert("The 'Email' field is required.");
		document.ecat.email.focus();
		return false;
	}
	/*
	if (emailCheck(document.ecat.email.value)){
		return true;
	}else{
		document.ecat.email.focus();
		return false;
	}
	*/
	if (document.ecat.address.value.length == 0){
		alert("The 'Address' field is required.");
		document.ecat.address.focus();
		return false;
	}
	if (document.ecat.city.value.length == 0){
		alert("The 'City' field is required.");
		document.ecat.city.focus();
		return false;
	}
	if (document.ecat.prov.value == "@@@"){
		alert("The 'Province' field is required.");
		document.ecat.prov.focus();
		return false;
	}
	if (document.ecat.pc.value.length == 0){
		alert("The 'Postal Code' field is required.");
		document.ecat.pc.focus();
		return false;
	}
	if (document.ecat.product.value == "@@@"){
		alert("The 'Product you\'re interested in' field is required.");
		document.ecat.product.focus();
		return false;
	}
	/*
	if (document.ecat.phone.value.length == 0){
		alert("The 'Phone' field is required.");
		document.ecat.phone.focus();
		return false;
	}
	*/
}
function emailCheck (emailStr) {
	/* The following variable tells the rest of the function whether or not
		to verify that the address ends in a two-letter country or well-known TLD.
		1 means check it, 0 means don't. 
	*/
	var checkTLD=1;
	/* The following is the list of known TLDs that an e-mail address must end with. */
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	/* The following pattern is used to check if the entered e-mail address
		fits the user@domain format.	It also is used to separate the username
		from the domain. 
	*/
	var emailPat=/^(.+)@(.+)$/;
	/* The following string represents the pattern for matching all special
		characters.	 We don't want to allow special characters in the address. 
		These characters include ( ) < > @ , ; : \ " . [ ] 
	*/
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	/* The following string represents the range of characters allowed in a 
		username or domainname.	 It really states which chars aren't allowed.
	*/
	var validChars="\[^\\s" + specialChars + "\]";
	/* The following pattern applies if the "user" is a quoted string (in
		which case, there are no rules about which characters are allowed
		and which aren't; anything goes).	 E.g. "jiminy cricket"@disney.com
		is a legal e-mail address. 
	*/
	var quotedUser="(\"[^\"]*\")";
	/* The following pattern applies for domains that are IP addresses,
		rather than symbolic names.	 E.g. joe@[123.124.233.4] is a legal
		e-mail address. NOTE: The square brackets are required. 
	*/
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	/* The following string represents an atom (basically a series of non-special characters.) */
	var atom=validChars + '+';
	/* The following string represents one word in the typical username.
		For example, in john.doe@somewhere.com, john and doe are words.
		Basically, a word is either an atom or quoted string. 
	*/
	var word="(" + atom + "|" + quotedUser + ")";
	// The following pattern describes the structure of the user
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	/* The following pattern describes the structure of a normal symbolic
		domain, as opposed to ipDomainPat, shown above. 
	*/
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	/* Finally, let's start trying to figure out if the supplied address is valid. */
	/* Begin with the coarse pattern to simply break up user@domain into
		different pieces that are easy to analyze. 
	*/
	var matchArray=emailStr.match(emailPat);
	if (matchArray == null) {
		/* Too many/few @'s or something; basically, this address doesn't
			even fit the general mould of a valid e-mail address. 
		*/
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	// Start by checking that only basic ASCII characters are in the strings (0-127).
	for (i=0; i < user.length; i++) {
		if (user.charCodeAt(i) > 127) {
			alert("Ths username contains invalid characters.");
			return false;
		}
	}
	for (i=0; i < domain.length; i++) {
		if (domain.charCodeAt(i) > 127) {
			alert("Ths domain name contains invalid characters.");
			return false;
		}
	}
	// See if "user" is valid 
	if (user.match(userPat) == null) {
		// user is not valid
		alert("The email username doesn't seem to be valid.");
		return false;
	}
	/* if the e-mail address is at an IP address (as opposed to a symbolic
		host name) make sure the IP address is valid. 
	*/
	var IPArray=domain.match(ipDomainPat);
	if (IPArray != null) {
		// this is an IP address
		for (var i=1; i <= 4; i++) {
			if (IPArray[i] > 255) {
				alert("Destination IP address is invalid!");
				return false;
			}
		}
		return true;
	}
	// Domain is symbolic name.	Check if it's valid.
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0; i < len; i++) {
		if (domArr[i].search(atomPat) == -1) {
			alert("The domain name does not seem to be valid.");
			return false;
		}
	}
	/* domain name seems valid, but now make sure that it ends in a
		known top-level domain (like com, edu, gov) or a two-letter word,
		representing country (uk, nl), and that there's a hostname preceding 
		the domain or country. 
	*/
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat) == -1) {
		alert("The address must end in a well-known domain or two letter " + "country.");
		return false;
	}
	// Make sure there's a host name preceding the domain.
	if (len < 2) {
		alert("This address is missing a hostname!");
		return false;
	}
	// If we've gotten this far, everything's valid!
	return true;
}