function PassCheck()
{
  error=false
  if(worldpay.MC_username.value==null||worldpay.MC_username.value=='')
  {
    alert("You must enter a user name")
      error=true
  }
  if(worldpay.MC_password.value==null||worldpay.MC_password.value=='')
  {
    alert("You must enter a password")
    error=true
  }
  if(worldpay.MC_password.value!=worldpay.Re_password.value)
  {
    alert("The passwords you entered are not equal")
    error=true
  }
  if(error==false)worldpay.submit()
}