/*********
switch an image by changing the src name from 'off' to 'on' and vice versa
*********/
function toggleImage(obj) {
	// The image is currently in the OFF state
	if (obj.src.indexOf('_off.') < 0)
	{
		obj.src = obj.src.replace('_on.', '_off.');
	}
	// The image is currently in the ON state
	else
	{
		obj.src = obj.src.replace('_off.', '_on.');
	}
}

/*********
validates an email address
*********/
function validateEmail(thisEmail) {
	//initiate returnMessage variable
	var returnMessage="";

	if(thisEmail == '')
	{
		// alert the user
		returnMessage = "Please type in a valid email address.";
	}
	else
	{
		// function to check email address vilidity
		function emailCheck(emailStr)
		{
			/* 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);
			//alert(emailStr);
			var checkMatch='-' + matchArray + '-';
			if (checkMatch == "-null-")
			{
			  /* Too many/few @'s or something; basically, this address doesn't
				 even fit the general mould of a valid e-mail address. */
				returnMessage = "The email address seems incorrect (check @ and .'s).";
			}
			else
			{
				var user=matchArray[1];
				var domain=matchArray[2];

				// See if "user" is valid
				if (user.match(userPat)==null)
				{
					// user is not valid
					returnMessage = "The email's username doesn't seem to be valid (before the @).";
				}

				/* 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) {
							returnMessage = "The email's destination IP address is invalid.";
						}
					}
				}

				// Domain is symbolic name
				var domainArray=domain.match(domainPat)
				if (domainArray==null) {
					returnMessage = "The email's domain name doesn't seem to be valid (after the @).";
				}

				/* domain name seems valid, but now make sure that it ends in a
				   three-letter word (like com, edu, gov) or a two-letter word,
				   representing country (uk, nl), and that there's a hostname preceding
				   the domain or country. */

				/* Now we need to break up the domain to get a count of how many atoms
				   it consists of. */
				var atomPat=new RegExp(atom,"g")
				var domArr=domain.match(atomPat)
				var len=domArr.length
				if (domArr[domArr.length-1].length<2 ||
					domArr[domArr.length-1].length>4) {
				   // the address must end in a two letter or three letter word.
				   returnMessage = "The email must end in a four-letter domain, three-letter domain, or two letter country.";
				}

				// Make sure there's a host name preceding the domain.
				if (len < 2) {
				   returnMessage="This email is missing a hostname!";
				}
			}
		}
		// call the validation function and return its result
		val=emailCheck(thisEmail);
		// if it returns val=no_submit, stop form
	}
	return returnMessage;
}

/************
verify Contact Form
************/
function verifyContactForm()
{
	formName='formContact';

	//initialize submitForm value
	submitForm=true;
	warningMessage="";
	formFocus="";

	//check name
	if (submitForm) {
		formElement="Name";
		thisDOM=eval('document.' + formName + '.' + formElement);
		if (thisDOM.value == "")
		{
			warningMessage='Please type in your name.';
			formFocus=formElement;
			submitForm=false;
		}
	}

	//check the email
	if (submitForm)
	{
		formElement="Email";
		thisDOM=eval('document.' + formName + '.' + formElement);
		//check the email address
		thisMessage=validateEmail(thisDOM.value);
		//if there is no message sent back, set the alert.
		if (thisMessage.length != 0)
		{
			warningMessage=thisMessage;
			formFocus=formElement;
			submitForm=false;
		}
	}
	//check comment
	if (submitForm)
	{
		formElement="Comments";
		thisDOM=eval('document.' + formName + '.' + formElement);
		if (thisDOM.value == "")
		{
			warningMessage='Please type in a comment.';
			formFocus=formElement;
			submitForm=false;
		}
	}

	//disable the form if the form checks out
	if (!submitForm)
	{
		alert(warningMessage);
	}

	//focus the form if necessary
	if (formFocus.length > 0)
	{
		thisDOM=eval('document.' + formName + '.' + formFocus);
		thisDOM.focus();
	}

	//return the boolean value whether or not we should submit this form
	return submitForm;
}

/*** E turns 10 Panel control ***/
$(document).ready(function() {
    $(".topMenuAction").click( function() {
        if ($("#openCloseIdentifier").is(":hidden")) {
            $("#e10panel").animate({
                marginTop: "-245px"
                }, 500 );
            $("#topMenuImage").html('<img alt="10 Years" src="/images/top_btn_10_off.png" width="19" height="28" onmouseout="toggleImage(this);" onmouseover="toggleImage(this);" />');
            $("#openCloseIdentifier").show();
        } else {
            $("#e10panel").animate({
                marginTop: "0px"
                }, 500 );
            $("#openCloseIdentifier").hide()
			$("#topMenuImage").html('<img alt="10 Years" src="/images/top_btn_10_on.png" width="19" height="28" />');;
        }
    }); 
});