<!-- Hiding
function IsEmailValid(oEmail, required)
{
  if ( !required ) {
    if (oEmail.value == "") {            
      emailOK = ""
      return emailOK
    }
  }

  if ( required ) {
    if (oEmail.value == "") {            
      emailOK = false
      alert('Please enter an email address')
      oEmail.focus()
      return emailOK
    }  
  }

  str = oEmail.value
  r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)")
  r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,4}|[0-9]{1,4})(\\]?)$")
  emailOK = (!r1.test(str) && r2.test(str))
  if (!emailOK) {
    alert("Please enter a valid email address")
    oEmail.focus()
    return false
  }
  return emailOK
}
//end hide-->