function emailCheck (emailStr) {
var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

if (user.match(userPat)==null) {
    return false
}

var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
		return false
	    }
    }
    return true
}

var domainArray=domain.match(domainPat)
if (domainArray==null) {
    return false
}

var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 ||
    domArr[domArr.length-1].length>3) {
   return false
}

if (len<2) {
   return false
}


return true;
}

function checkData ()
{
   if (document.orderform.CUSTOMER_NAME.value != '')
   {
      if (document.orderform.CUSTOMER_NAME.value.length < 5)
      {
         alert('Please complete the name of the person or company to invoice')
         document.orderform.CUSTOMER_NAME.focus()
         return false
      }
   }
   else
   {
         alert('Please complete the name of the person or company to invoice')
         document.orderform.CUSTOMER_NAME.focus()
         return false
   }
   if (document.orderform.CONTACT_NAME.value != '')
   {
      if (document.orderform.CONTACT_NAME.value.length < 5)
      {
         alert('Please complete your name')
         document.orderform.CONTACT_NAME.focus()
         return false
      }
   }
   else
   {
         alert('Please complete your name')
         document.orderform.CONTACT_NAME.focus()
         return false
   }
   if (document.orderform.CONTACT_CELL_NO.value == '')
   {
      alert('Please fill in your cellular phone number.')
      document.orderform.CONTACT_CELL_NO.focus()
      return false
   }
   if (document.orderform.TEL.value == '')
   {
      alert('Please fill in your telephone number.')
      document.orderform.TEL.focus()
      return false
   }
   if (document.orderform.EMAIL.value == '')
   {
      alert('Please fill in your email address.')
      document.orderform.EMAIL.focus()
      return false
   }
   if (document.orderform.POSTAL_ADDRESS.value == '')
   {
      alert('Please provide a postal address.')
      document.orderform.POSTAL_ADDRESS.focus()
      return false
   }
   if (document.orderform.SUBURB.value == '')
   {
      alert('Please provide your suburb.')
      document.orderform.SUBURB.focus()
      return false
   }
   if (document.orderform.POSTAL_CODE.value == '')
   {
      alert('Please provide your postal code.')
      document.orderform.POSTAL_CODE.focus()
      return false
   }
   if (document.orderform.PROVINCE.value == '')
   {
      alert('Please provide your province.')
      document.orderform.PROVINCE.focus()
      return false
   }
   if (emailCheck (document.orderform.EMAIL.value))
   {
         if (confirm('Carefully check your Email Address:\n\n' + document.orderform.EMAIL.value + '\n\nIf it is correct click OK, or else click CANCEL and correct it.'))
         {
			return true;
         }
         else
         {
            document.orderform.EMAIL.focus()
            return false;
         }
   }
      else
   {
         alert('Please correct your your email address.')
         document.orderform.EMAIL.focus()
         return false;
   }
}