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=/^(|arpa|root|aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel|ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|ee|eg|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)$/;
	
	/* 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. */
	
	document.getElementById('informationBar').innerHTML = "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) {
	document.getElementById('informationBar').innerHTML = "Ths username contains invalid characters.";
	return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
	if (domain.charCodeAt(i)>127) {
	document.getElementById('informationBar').innerHTML = "The domain name contains invalid characters.";
	return false;
	   }
	}
	
	// See if "user" is valid 
	
	if (user.match(userPat)==null) {
	
	// user is not valid
	
	document.getElementById('informationBar').innerHTML = "The email address 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) {
	document.getElementById('informationBar').innerHTML = "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) {
	document.getElementById('informationBar').innerHTML = "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) {
	document.getElementById('informationBar').innerHTML = "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) {
	document.getElementById('informationBar').innerHTML = "This address is missing a hostname!";
	return false;
	}
	
	// If we've gotten this far, everything's valid!
	return true;
}


/**
 * This is called when someone submits the form. It checks the required fields.
 * If the required fields match the restrictions, then it sends the request to
 * the server, where it parses the form and sends the email. Change this method
 * to perform whatever validation the form requires.
**/
function validateFields() {
	// grab the required fields in the form and the form itself
	var frmEl = document.getElementById('contactForm');
	var nameField = document.getElementById('nameField');
	var emailField = document.getElementById('emailField');
	var phoneField = document.getElementById('phoneField');
	var messageField = document.getElementById('messageField');

	var whiteSpace = /^[\s]+$/;
	var okToSend = true;
	document.getElementById('informationBar').innerHTML ="";
	
	// Check to see if a required field is blank or null. If so, set an error message.
	if ( nameField.value == '' || whiteSpace.test(nameField.value) ) {
		document.getElementById('informationBar').innerHTML = "Please enter your name.";
		okToSend = false;
	} else if ( phoneField.value == '' || whiteSpace.test(phoneField.value) ) {
		document.getElementById('informationBar').innerHTML = "Please enter your telephone.";
		okToSend = false;
	} else if ( messageField.value == '' || whiteSpace.test(messageField.value) ) {
		document.getElementById('informationBar').innerHTML = "Please leave a message.";
		okToSend = false;
	} else if(!emailCheck(emailField.value)){
		okToSend = false;
	}

	// If any of the checks for required information failed, 	
	if(okToSend == true){
		sendPosEmail();
	}
}

/**
 * Sends the actual data in the form to the server via an AJAX request.
 * Change this method to extract whatever data you need to be taken from
 * the form and uploaded to the server.
**/
function sendPosEmail () {
	// grab the fields in the form and the form itself
	var frmEl = document.getElementById('contactForm');
	var nameField = document.getElementById('nameField');
	var emailField = document.getElementById('emailField');
	var phoneField = document.getElementById('phoneField');
	var messageField = document.getElementById('messageField');
	var dateField = document.getElementById('dateField');
	var timeField = document.getElementById('timeField');
	var locationField = document.getElementById('locationField');

	// the page on the server that sends the email
	var page = "serverScripts/sendContactEmail.php?contact=true&xml=true";
	showContactTimer(); // quickly begin the load bar
	
	// convert (&, +, =) to string equivs. Needed so URL encoded POST won't choke.
	var name = cleanString(nameField.value);
	var email = cleanString(emailField.value);
	var phone = cleanString(phoneField.value);
	var message = cleanString(messageField.value);
	var date = cleanString(dateField.value);
	var time = cleanString(timeField.value);
	var location = cleanString(locationField.value);

	// create the data that is to be sent
	var data = "name="+name+"&email="+email+"&phone="+phone+"&message="+message+"&date="+date+"&time="+time+"&location="+location;
	// put the data into the request to be sent to the server
	loadXMLPosDoc(page,data);
	
}
/**
 * Cleans a string so that it can go in a string
**/
function cleanString(str){
	str = str.replace(/&/g,"**am**");
	str = str.replace(/=/g,"**eq**");
	str = str.replace(/\+/g,"**pl**");
	return str;
}

function showContactTimer () {
	var loader = document.getElementById('informationBar');
	loader.innerHTML = "<img src='kf_sitefiles/loading.gif'/>";
	sentTimer = setTimeout("hideContactTimer()",6000);
}

function hideContactTimer () {

	// Replace the load bar with whatever the server sent back
	var informationBar = document.getElementById('informationBar');
	informationBar.innerHTML = ''+grabPosXML("confirmation");

	// Now clear the form elements
	var fieldArea = document.getElementById('contactForm');
	var inputs = fieldArea.getElementsByTagName('input');
	var inputsLen = inputs.length;
	var tAreas = fieldArea.getElementsByTagName('textarea');
	var tAreasLen = tAreas.length;
	var selects = fieldArea.getElementsByTagName('select');
	var selectsLen = selects.length;
	for ( i=0;i<inputsLen;i++ ) {
		if ( inputs[i].getAttribute('type') == 'text' ) {
			inputs[i].value = '';
		}
	}
	for ( j=0;j<tAreasLen;j++ ) {
		tAreas[j].value = '';
	}
	for ( k=0;k<selectsLen;k++ ) {
		selects[k].selectedIndex = 0;
	}
}

function ajaxContact() {
var frmEl = document.getElementById('contactForm');
addEvent(frmEl, 'submit', validateFields, false);
frmEl.onsubmit = function() { return false; }
}
addEvent(window, 'load',ajaxContact, false);