<!--

userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(changeImages.arguments[i],0);
			}
			else {
				img = document.images[changeImages.arguments[i]];
			}
			if (img) {
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		articles_over = newImage("http://www.craigalexanderphotography.com/images/articles-over.gif");
		portfolio_over = newImage("http://www.craigalexanderphotography.com/images/portfolio-over.gif");
		prints_over = newImage("http://www.craigalexanderphotography.com/images/prints-over.gif");
		contact_over = newImage("http://www.craigalexanderphotography.com/images/contact-over.gif");
		port_nat_over = newImage("http://www.craigalexanderphotography.com/images/port_nat-over.jpg");
		port_por_over = newImage("http://www.craigalexanderphotography.com/images/port_por-over.jpg");
		port_doc_over = newImage("http://www.craigalexanderphotography.com/images/port_doc-over.jpg");
		port_bla_over = newImage("http://www.craigalexanderphotography.com/images/port_bla-over.jpg");
		preloadFlag = true;
	}
}

function update(url)
{
	document['mainPic'].src=url;
	return;
}

function validateEmail(checkThisEmail)
{
var isCorrect = true;
var myEMailIsValid = true;
var myAtSymbolAt = checkThisEmail.indexOf('@');
var myLastDotAt = checkThisEmail.lastIndexOf('.');
var mySpaceAt = checkThisEmail.indexOf(' ');
var myLength = checkThisEmail.length;

if (myAtSymbolAt < 1 ) {
  myEMailIsValid = false;
  }

if (myLastDotAt < myAtSymbolAt) {
  myEMailIsValid = false;
  }

if (myLength - myLastDotAt <= 2) {
  myEMailIsValid = false;
  }

if (mySpaceAt != -1){
  myEMailIsValid = false;
  }

if (myEMailIsValid == false){
  alert("Please enter a valid email address.");
  event.returnValue=false;
  isCorrect = false;
  }

  return isCorrect;
}

function cancel(e)
{
  if (e && e.preventDefault)
    e.preventDefault(); // DOM style
  return false; // IE style
}

function validate() {
var isValid = true;
temp1=contact_form.firstname.value;
temp2=contact_form.lastname.value;
temp3=contact_form.email.value;

if (temp1=='') {
  alert('Please enter your first name.');
  return false;
}
if (temp2=='') {
  alert('Please enter your last name.');
  return false;
}


if (validateEmail(temp3) == false){
  return false;
}

  return true;
}

// -->