/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Anita Sudhakar :: http://www.smartwebby.com/DHTML/email_validation.asp */

function echeck(str) {
  var at="@"
  var dot="."
  var lat=str.indexOf(at)
  var lstr=str.length
  var ldot=str.indexOf(dot)
  var errStr='Your email address doesn\'t appear to be valid,\n please check it and try again.';
  if (str.indexOf(at)==-1){
     alert(errStr)
     return false
  }
  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
     alert(errStr)
     return false
  }
  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
      alert(errStr)
      return false
  }
   if (str.indexOf(at,(lat+1))!=-1){
      alert(errStr)
      return false
   }
   if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
      alert(errStr)
      return false
   }
   if (str.indexOf(dot,(lat+2))==-1){
      alert(errStr)
      return false
   }
   if (str.indexOf(" ")!=-1){
      alert(errStr)
      return false
   }
   return true          
}