if (document.images) {

  image0on = new Image();
  image0on.src = "http://www.naturalexpressions.com/wpd/images/but_enter_on.gif";

  image0off = new Image();
  image0off.src = "http://www.naturalexpressions.com/wpd/images/but_enter_off.gif";

  image1on = new Image();
  image1on.src = "http://www.naturalexpressions.com/wpd/images/but_home_on.gif";

  image1off = new Image();
  image1off.src = "http://www.naturalexpressions.com/wpd/images/but_home_off.gif";

  image2on = new Image();
  image2on.src = "http://www.naturalexpressions.com/wpd/images/but_faq_on.gif";

  image2off = new Image();
  image2off.src = "http://www.naturalexpressions.com/wpd/images/but_faq_off.gif";

  image3on = new Image();
  image3on.src = "http://www.naturalexpressions.com/wpd/images/but_samples_on.gif";

  image3off = new Image();
  image3off.src = "http://www.naturalexpressions.com/wpd/images/but_samples_off.gif";

  image4on = new Image();
  image4on.src = "http://www.naturalexpressions.com/wpd/images/but_contact_on.gif";

  image4off = new Image();
  image4off.src = "http://www.naturalexpressions.com/wpd/images/but_contact_off.gif";

  image5on = new Image();
  image5on.src = "http://www.naturalexpressions.com/wpd/images/but_prices_on.gif";

  image5off = new Image();
  image5off.src = "http://www.naturalexpressions.com/wpd/images/but_prices_off.gif";


}

function turnOn(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "on.src");
  }
}

function turnOff(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "off.src");
  }
}

function winopen(url,stuff,morestuff) {
     window.open(url,stuff,morestuff);
}

function checkSub(){
	var strerror;
	strerror = "";
	if (document.contact.name.value==""){
		strerror = "The name is required.\n" + strerror;;
	}
	if (document.contact.phone.value == "") {
		strerror = "The phone number is required.\n" + strerror;;
	}
	if (document.contact.email.value == "") {
		strerror = "The email is required.\n" + strerror;
	} else if (document.contact.email.value.search(/^.+\@.+\..+$/) == -1) {
		strerror = "The email address is not valid.\n" + strerror;
	}
	if (strerror != ""){
		alert(strerror);
	}else{
		document.contact.submit();
	}
}