function preLoad() {

nav_home = new Image();
nav_home.src = "images/nav_home_over.gif";

nav_portfolio = new Image();
nav_portfolio.src = "images/nav_portfolio_over.gif";

nav_contact_us = new Image();
nav_contact_us.src = "images/nav_contact_us_over.gif";
}

if (document.images) { 

image0on = new Image();
image0on.src = "images/nav_home_over.gif";

image0off = new Image();
image0off.src = "images/nav_home.gif";

image4on = new Image();
image4on.src = "images/nav_portfolio_over.gif";

image4off = new Image();
image4off.src = "images/nav_portfolio.gif";

image5on = new Image();
image5on.src = "images/nav_contact_us_over.gif";

image5off = new Image();
image5off.src = "images/nav_contact_us.gif";

}

function changeImages() {

if (document.images) { 
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
}
}
}

function formValidator()
{

  // check to see if the field is blank
  if (document.form.realname.value == "")
  {
    alert("Please enter your name.");
    document.form.realname.focus();
    return (false);
  }

 // test if valid email address, must have @ and .
  var checkEmail = "@.";
  var checkStr = document.form.email.value;
  var EmailValid = false;
  var EmailAt = false;
  var EmailPeriod = false;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkEmail.length;  j++)
    {
      if (ch == checkEmail.charAt(j) && ch == "@")
        EmailAt = true;
      if (ch == checkEmail.charAt(j) && ch == ".")
        EmailPeriod = true;
	  if (EmailAt && EmailPeriod)
		break;
	  if (j == checkEmail.length)
		break;
	}
	// if both the @ and . were in the string
    if (EmailAt && EmailPeriod)
    {
		EmailValid = true
		break;
	}
  }
  if (!EmailValid)
  {
    alert("Please enter a valid email address.");
    document.form.email.focus();
    return (false);
  }

  // check to see if the field is blank
  if (document.form.Phone.value == "")
  {
    alert("Please enter your phone number.");
    document.form.Phone.focus();
    return (false);
  }

  // check to see if the field is blank
  if (document.form.Venue.value == "")
  {
    alert("Please select a branch.");
    document.form.Venue.focus();
    return (false);
  }

  // check to see if the field is blank
  if (document.form.Time.value == "")
  {
    alert("Please enter what time you wish to have your table ready.");
    document.form.Time.focus();
    return (false);
  }

  // check to see if the field is blank
  if (document.form.Persons.value == "")
  {
    alert("Please enter the number of guests in your party.");
    document.form.Persons.focus();
    return (false);
  }

}

function formValidatorContact()
{

  // check to see if the field is blank
  if (document.form.realname.value == "")
  {
    alert("Please enter your name.");
    document.form.realname.focus();
    return (false);
  }

 // test if valid email address, must have @ and .
  var checkEmail = "@.";
  var checkStr = document.form.email.value;
  var EmailValid = false;
  var EmailAt = false;
  var EmailPeriod = false;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkEmail.length;  j++)
    {
      if (ch == checkEmail.charAt(j) && ch == "@")
        EmailAt = true;
      if (ch == checkEmail.charAt(j) && ch == ".")
        EmailPeriod = true;
	  if (EmailAt && EmailPeriod)
		break;
	  if (j == checkEmail.length)
		break;
	}
	// if both the @ and . were in the string
    if (EmailAt && EmailPeriod)
    {
		EmailValid = true
		break;
	}
  }
  if (!EmailValid)
  {
    alert("Please enter a valid email address.");
    document.form.email.focus();
    return (false);
  }

  // check to see if the field is blank
  if (document.form.Country.value == "")
  {
    alert("Please select a country.");
    document.form.Country.focus();
    return (false);
  }

  // check to see if the field is blank
  if (document.form.Message.value == "")
  {
    alert("Please enter a message.");
    document.form.Message.focus();
    return (false);
  }

}