// -----------------------------------------------------------------

// Function    : IsEmailValid

// Language    : JavaScript

// Description : Checks if given email address is of valid syntax

// Copyright   : (c) 1998 Shawn Dorman

// http://www.goodnet.com/~sdorman/web/IsEmailValid.html

// -----------------------------------------------------------------

// Ver    Date    Description of modification

// --- ---------- --------------------------------------------------

// 1.0 09/04/1996 Original write

// 1.1 09/30/1998 CHG: Use standard header format

// -----------------------------------------------------------------

// Source: Webmonkey Code Library

// (http://www.hotwired.com/webmonkey/javascript/code_library/)

// -----------------------------------------------------------------



function IsEmailValid(FormName,ElemName)

{

var EmailOk  = true

var Temp     = document.forms[FormName].elements[ElemName]

var AtSym    = Temp.value.indexOf('@')

var Period   = Temp.value.lastIndexOf('.')

var Space    = Temp.value.indexOf(' ')

var Length   = Temp.value.length - 1   // Array is from 0 to length-1



if ((AtSym < 1) ||                     // '@' cannot be in first position

    (Period <= AtSym+1) ||             // Must be atleast one valid char btwn '@' and '.'

    (Period == Length ) ||             // Must be atleast one valid char after '.'

    (Space  != -1))                    // No empty spaces permitted

   {  

      EmailOk = false

      alert('Please enter a valid e-mail address!')

      Temp.focus()

   }

return EmailOk

}