function popup(mylink, windowname)
{
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
   href=mylink;
else
   href=mylink.href;
window.open(href, windowname, 'width=800,height=800,scrollbars=yes');
return false;
}

function validate_form ( ) 
{ 
var valid = true; 
if ( document.formMailingList.txtEmail.value == "" ) 
{ 
alert ( "Please enter a Email address." ); 
valid = false; 
} 
return valid; 
} 

function emailCheck (emailStr) { 
var checkTLD=0; 
var knownDomsPat=/ ^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|formMailingList|pro|museum)$/; 
var emailPat=/^(.+)@(.+)$/; 
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 +")*$"); 
var matchArray=emailStr.match(emailPat); 
if (matchArray==null) { 
alert("Please enter a valid Email address."); 
return false; 
} 
var user=matchArray[1]; 
var domain=matchArray[2]; 
for (i=0; i<user.length; i++) { 
if (user.charCodeAt(i)>127) { 
alert("The username contains invalid characters."); 
return false; 
} 
} 
for (i=0; i<domain.length; i++) { 
if (domain.charCodeAt(i)>127) { 
alert("Ths domain name contains invalid characters."); 
return false; 
} 
} 
if (user.match(userPat)==null) { 
alert("The username is invalid."); 
return false; 
} 
var IPArray=domain.match(ipDomainPat); 
if (IPArray!=null) { 
for (var i=1;i<=4;i++) { 
if (IPArray>255) { 
alert("The destination IP address is invalid."); 
return false; 
} 
} 
return true; 
} 
var atomPat=new RegExp("^" + atom + "$"); 
var domArr=domain.split("."); 
var len=domArr.length; 
for (i=0;i<len;i++) { 
if (domArr[i].search(atomPat)==-1) { 
alert("The domain name is invalid."); 
return false; 
} 
} 
if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) { 
alert("The domain name extension is invalid."); 
return false; 
} 
if (len<2) { 
alert("The address is missing a hostname."); 
return false; 
}
return true;
} 

var counter=0; 
function isReady() {
var _ret=false;
if(emailCheck(document.formMailingList.txtEmail.value))
  _ret=true;
else
  _ret=false;
if(_ret)
  if(counter++)
  {
    _ret=false;
    
  }
  else
    _ret=true;
return _ret; 
}