function submitit(){
var FirstName = document.theform.FirstName.value
var LastName = document.theform.LastName.value
var Phone = document.theform.Phone.value
var Email = document.theform.Email.value
var Details = document.theform.Details.value

if (FirstName==""){
alert("Please enter your first name")
document.theform.FirstName.focus()
return false
}

if (LastName==""){
alert("Please enter your last name")
document.theform.LastName.focus()
return false
}

if (Phone==""){
alert("Please enter your phone number")
document.theform.Phone.focus()
return false
}

if (Email.indexOf('@', 0) == -1 || Email.indexOf('.', 0) == -1){ 
alert("No valid e-mail address entered.");
document.theform.Email.focus()
return false
}

if (Details==""){
alert("Please enter details of your enquiry")
document.theform.Details.focus()
return false
}
}