// JS FORM VALIDATION COLLECTION (c) 2006 Carl Jagt

/* 	Insert into HTML as <script language="javascript" src="lib_validate.js"></script>
	Script will:
		autorun
		attach check ONCHANGE to email field
		loop through and if CLASS="validate" then attach ONSUBMIT to parent FORM
*/

function validateEmail(emailStr) {
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("The username contains invalid characters.");
		return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("The domain name contains invalid characters.");
		return false;
	   }
	}
	if (user.match(userPat)==null) {
		alert("The username doesn't seem to be valid.");
		return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("Destination IP address is invalid!");
				return false;
			}
		}
		return true;
	}
	var atomPat=new RegExp("^" + atom + "$");
	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;
	   }
	}
	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;
	}
	if (len<2) {
		alert("This address is missing a hostname!");
		return false;
	}
	return true;
}

function validateForm() {
	canSubmit = false;
	for (i=0; i<document.forms.length; i++){
		myInputs = document.forms[i];
		for (j=0; j<myInputs.length; j++) {
			if(myInputs[j].tagName != 'FIELDSET') {
				if (myInputs[j].name.toLowerCase() == 'email'){
					if (validateEmail(myInputs[j].value)){
						canSubmit = true;
					}else{
						canSubmit = false;
					}
				}
				if(myInputs[j].className == 'required') {
					canSubmit = false;
					alert('Some required fields remain empty.');
					return false;
				}
			}
		}
		if (canSubmit){
			myForm.submit();
		}else{
			return false;
		}
	}
}

function addListener(obj,event,method) {
	eval('myForm.elements[j].'+event+' = '+method+';');
}

function alertFormElement(obj){
	if((this.value == '')||(this.value==undefined)){
		alert(this.name + ' cannot be left empty.');
		this.className = 'required';
	}else{
		this.className = 'fulfilled';
	}
}

function initValidate(obj) {
	if (document.forms.length == 0){
		return;
	}else{
		for (i=0; i<document.forms.length; i++){
			myForm = document.forms[i];
			for (j=0; j<myForm.length; j++) {
				if(/required/.test(myForm.elements[j].className)) {
					addListener(myForm.elements[j],'onblur', 'alertFormElement');
				}
				if (myForm.elements[j].type == 'submit'){
					if(myForm.name != 'search'){
						addListener(myForm.elements[j], 'onclick', 'validateForm');
					}
				}
			}
		}
	}
}

if (typeof window.addEventListener != 'undefined') {
   window.addEventListener('load', initValidate, false);
}else if (typeof window.attachEvent != 'undefined') {
   window.attachEvent('onload', initValidate);
}