function isValidEmail(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)
	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("Please enter a valid email.")
		return false
	}
	var user=matchArray[1]
	var domain=matchArray[2]

	// 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("The email destination IP address is invalid!")
			return false
			}
		}
		return true
	}

	// Domain is symbolic name
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		alert("The email domain name doesn't seem to be valid.")
		return false
	}

	/* 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>3) {
	   // the address must end in a two letter or three letter word.
	   alert("Please enter a valid email.")
	   return false
	}

	// Make sure there's a host name preceding the domain.
	if (len<2) {
	   var errStr="The email address is missing a hostname!"
	   alert(errStr)
	   return false
	}

	// If we've gotten this far, everything's valid!
	return true;
}

function ew_IsHiddenTextArea(input_object) {
	return (input_object && input_object.type && input_object.type == "textarea" &&
		input_object.style && input_object.style.display &&
		input_object.style.display == "none");
}

function ew_SetFocus(input_object) {
	if (!input_object || !input_object.type)
		return;
	var type = input_object.type;	 			
	if (type == "RADIO" || type == "CHECKBOX") {
		if (input_object[0])
			input_object[0].focus();
		else
			input_object.focus();
	}	else if (!ew_IsHiddenTextArea(input_object)) {input_object.focus();}  
	if (type == "TEXT" || type == "PASSWORD" || type == "TEXTAREA" || type == "FILE") {
		if (!ew_IsHiddenTextArea(input_object))
			input_object.select();
	}
}

function EW_onError(form_object, input_object, object_type, error_message) {
	alert(error_message);
	if (typeof ew_GotoPageByElement != 'undefined') // ***check if multi-page
		ew_GotoPageByElement(input_object);									
	ew_SetFocus(input_object);
	return false;	
}

function EW_hasValue(obj, obj_type) {
	if (obj_type == "TEXT" || obj_type == "PASSWORD" || obj_type == "TEXTAREA" || obj_type == "FILE")	{
		if (obj.value.length == 0) 
			return false;		
		else 
			return true;
	}	else if (obj_type == "SELECT") {
		if (obj.type != "select-multiple" && obj.selectedIndex == 0)
			return false;
		else if (obj.type == "select-multiple" && obj.selectedIndex == -1)
			return false;
		else
			return true;
	}	else if (obj_type == "RADIO" || obj_type == "CHECKBOX")	{
		if (obj[0]) {
			for (i=0; i < obj.length; i++) {
				if (obj[i].checked)
					return true;
			}
		} else {
			return (obj.checked);
		}
		return false;	
	}
}

function EW_checkMyForm(EW_this) {
if (EW_this.name && !EW_hasValue(EW_this.name, "TEXT")) {
	if (!EW_onError(EW_this, EW_this.name, "TEXT", "Please enter required field - Name"))
		return false;
}
if (EW_this.company && !EW_hasValue(EW_this.company, "TEXT")) {
	if (!EW_onError(EW_this, EW_this.company, "TEXT", "Please enter required field - Company"))
		return false;
}
if (EW_this.address && !EW_hasValue(EW_this.address, "TEXTAREA")) {
	if (!EW_onError(EW_this, EW_this.address, "TEXTAREA", "Please enter required field - Address"))
		return false;
}
if (EW_this.country.value=="NONE") {
	alert("Please select a required field - Country");
	EW_this.country.focus();
	return false;
}
if (EW_this.telephone && !EW_hasValue(EW_this.telephone, "TEXT")) {
	if (!EW_onError(EW_this, EW_this.telephone, "TEXT", "Please enter required field - Telephone no."))
		return false;
}
if(!isValidEmail(EW_this.email.value)) {
	EW_this.email.focus();
	return false;
}
if (EW_this.comments && !EW_hasValue(EW_this.comments, "TEXTAREA")) {
	if (!EW_onError(EW_this, EW_this.comments, "TEXTAREA", "Please enter required field - Questions"))
		return false;
}
return true;
}