function Check_Signup_Form(emailStr){
 if (Journal_Signup.req_login.value==""){ 
  alert("Please enter a log in")
  Journal_Signup.req_login.focus()
  return false;}
 if (Journal_Signup.req_email.value==""){
  alert("Please enter your email address")
  Journal_Signup.req_email.focus()
  return false;}
 if (Journal_Signup.req_password.value==""){
  alert("Please enter a password")
  Journal_Signup.req_password.focus()
  return false;}
 if (Journal_Signup.req_password2.value==""){
  alert("Please enter a password again")
  Journal_Signup.req_password2.focus()
  return false;}
 if (Journal_Signup.req_firstname.value==""){
  alert("Please enter your first name")
  Journal_Signup.req_firstname.focus()
  return false;}
 if (Journal_Signup.req_lastname.value==""){
  alert("Please enter your last name")
  Journal_Signup.req_lastname.focus()
  return false;}
 if (Journal_Signup.req_gender.value==""){
  alert("Please indicate your gender")
  Journal_Signup.req_gender.focus()
  return false;}
 if (Journal_Signup.req_phone.value=="" || Journal_Signup.req_phone.value.length != 10 || isNaN(Journal_Signup.req_phone.value)){
  alert("Please enter your phone number")
  Journal_Signup.req_phone.focus()
  return false;}
 if (Journal_Signup.req_zip.value=="" || Journal_Signup.req_zip.value.length != 5 || isNaN(Journal_Signup.req_zip.value)){
  alert("Please enter your zip code")
  Journal_Signup.req_zip.focus()
  return false;}

 var checkTLD=1;
 var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|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("Email address is not valid");
   return false;}
    
 var user=matchArray[1];
 var domain=matchArray[2];

 for (i=0; i<user.length; i++) {
  if (user.charCodeAt(i)>127) {
   alert("Email address is not valid");
   return false;
  }
 }
   
 for (i=0; i<domain.length; i++) {
  if (domain.charCodeAt(i)>127) {
   alert("Email address is not valid");
   return false;
  }
 }

 if (user.match(userPat)==null) {
  alert("Email address is not valid");
  return false;
 }

 var IPArray=domain.match(ipDomainPat);
 
 if (IPArray!=null) {
  for (var i=1;i<=4;i++) {
   if (IPArray[i]>255) {
    alert("Email address is not valid");
    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("Email address is not valid");
   return false;
  }
 }

 if (checkTLD && domArr[domArr.length-1].length!=2 && 
  domArr[domArr.length-1].search(knownDomsPat)==-1) {
  alert("Email address is not valid");
  return false;
 }

 if (len<2) {
  alert("Email address is not valid");
  return false;
 }
 
 return true;
}