// JavaScript Document
start_slideshow(1, 3, 4000);
function start_slideshow(start_frame, end_frame, delay) {
	setTimeout(switch_slides(start_frame,start_frame,end_frame, delay), delay);
}
function switch_slides(frame, start_frame, end_frame, delay) {
	return (function() {
		if (document.getElementById("slideshow") != null) {
			if (frame == end_frame) { 
				return false;
			} else { 
				Effect.Fade('slideshow' + frame);
				frame = frame + 1;
				setTimeout("Effect.Appear('slideshow" + frame + "');", 400);
				setTimeout(switch_slides(frame, start_frame, end_frame, delay), delay + 850);
			}
		}
	})
}

function validateContactForm(){
	
	var name = document.contactform.name;
	var email = document.contactform.email;
	var comments = document.contactform.comments;
	var whiteSpace = /^[\s]+$/;
	
	if ( comments.value == "" || whiteSpace.test(comments.value) ){
		alert("You are trying to send an empty email. \nPlease enter a message and resubmit.");
		return false;
	} else if( name.value == "" ){
		alert("The 'Name' field is required.");
		return false;
	} else if ( email.value == "" ) {
		alert("The 'Email' field is required.");	
		return false;
	} else {
		if (emailCheck(email.value)){
			form.contactform.submit();
		} else {
			return false;
		}
	}
}

function emailCheck (emailStr) {

	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum|tv|co.uk|nz|ws|cc|de|jp|be)$/;
	var emailPat=/^(.+)@(.+)$/;
	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("Please enter a valid email address.");
		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("This domain name contains invalid characters.");
			return false;
	   }
	}
	
	if (user.match(userPat)==null) {
		alert("Please enter a valid username.");
		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("Please enter a valid email address.");
			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;
}