function isEmailAddr(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

//Check customer details form is completed
function validateDetails(frm) {

    // Check the Email field to see if any characters were entered
    if (frm.name.value.length == 0)
    {
        alert("Please enter your Name.")
        frm.name.focus()
        return false
    }
		
	if (frm.address.value.length == 0)
    {
        alert("Please enter your address details.")
        frm.address.focus()
        return false
    }

	if (frm.postcode.value.length == 0)
    {
        alert("Please enter your postcode.")
        frm.postcode.focus()
        return false
    }

	if (frm.phone_number_1.value.length == 0)
    {
        alert("Please enter your Phone Number.")
        frm.phone_number_1.focus()
        return false
    }

    if (frm.email.value.length == 0)
    {
        alert("Please enter your email address.")
        frm.email.focus()
        return false
    }
	
	if (!isEmailAddr(frm.email.value))
    {
    alert("Please enter a complete email address in the form: yourname@yourdomain.com");
    frm.email.focus();
    return (false);
    }

if (frm.terms.checked == false)
    {
        alert("You have not agreed to our terms and conditions.")
        frm.terms.focus()
        return false
    }
}