function checkrequired(which) {
  var max=200;
  var pass=true;
 if (document.images) 
 {
  for (i=0;i<which.length;i++) 
  {
    var tempobj=which.elements[i];
    if (tempobj.name.substring(0,8)=="required") 
      {
       if (((tempobj.type=="text"||tempobj.type=="textarea")&&
       tempobj.value=='')||(tempobj.type.toString().charAt(0)=="s"&&
       tempobj.selectedIndex==0)) 
         {
          pass=false;
          break;
         }
      }
   }
 }
  if (!pass) 
  {
    shortFieldName=tempobj.name.substring(8,30).toUpperCase();
    alert("Please make sure the "+shortFieldName+" field was properly completed.");
    return false;
  }

 
//---------------------
//check email validation
//---------------------
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=which.requiredemail.value.match(emailPat);

if (matchArray==null) {
  alert("Email address seems incorrect (check @ and .'s)");
  return false;
}

var user=matchArray[1];
var domain=matchArray[2];

for (i=0; i<user.length; i++) {
  if (user.charCodeAt(i)>127) {
    alert("The account/username on the email contains invalid characters.");
    return false;
   }
}

for (i=0; i<domain.length; i++) {
  if (domain.charCodeAt(i)>127) {
    alert("The domain name on the email address contains invalid characters.");
    return false;
   }
}

if (user.match(userPat)==null) {
  alert("The account/username on the email address doesn't seem to be valid.");
  return false;
}

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

if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) {
  alert("The email address must end in a well-known domain or two letter " + "country.");
  return false;
}

if (len<2) {
  alert("This email address is missing a hostname!");
  return false;
}
//-----------------------
//end of email validation
//----------------------- 
 

 return true;
}