//checks if a required field has been left empty
function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false}
else {return true}
}
}

function validate_form(thisform)
{
with (thisform)
{
if (validate_required(name,"Name must be filled out!")==false)
  {name.focus();return false}
  
if (validate_required(email,"Email must be filled out!")==false)
  {email.focus();return false}
if (validate_email(email,"Not a valid e-mail address!")==false)
  {email.focus();return false}

if (validate_required(phone,"Phone must be filled out!")==false)
  {phone.focus();return false}

if (validate_required(city_state,"City must be filled out!")==false)
  {city_state.focus();return false}
  
if (validate_required(country,"Country must be filled out!")==false)
  {country.focus();return false}

if (validate_required(arrive_on,"comments must be filled out!")==false)
  {arrive_on.focus();return false}
    
if (validate_required(travel_plan,"travel plan must be filled out!")==false)
  {travel_plan.focus();return false}

if (validate_required(comments,"comments must be filled out!")==false)
  {comments.focus();return false}
  
  
  
    
}
}

function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false}
else {return true}
}
}

function validate_name(field,alerttxt)
{
with (field)
{
var illegalChars = /\W/;
  // allow only letters, numbers, and underscores
    if (illegalChars.test(value)) {alert(alerttxt);return false}
else {return true}
}
}

function validate_phone(field,alerttxt)
{
with (field)
{
if (isNaN(parseInt(value))|| value.length <10) {alert(alerttxt);return false}
else {return true}
}
}

function validate_country(field,alerttxt)
{
with (field)
{
var Charset = /^[a-zA-Z]+$/;
 if (!(Charset.test(value))) {alert(alerttxt);return false}
else {return true}
}
}

function validate_comments(field,alerttxt)
{
with (field)
{
var Commset = /^\s+$/;
 if ((Commset.test(value))) {alert(alerttxt);return false}
else {return true}
}
}