function validateSN(sn){	
   	if(sn.length < 1){return RetVal.EMPTY_ERR;}
	else if(sn.length <3 ){	return RetVal.MIN_ERR;}
	else if(sn.length > 16){return RetVal.MAX_ERR;}
	else{	
		var snRegExp = /^([a-zA-Z]{1})([a-zA-Z0-9\s]*)$/;  
	  	var result = (snRegExp.test(sn))?  RetVal.SUCCESS :  RetVal.INVALID_ERR; 
	   	return result;
	   }   
}

function valPassword(pwd,minLength){	
	if(pwd.length < 1){ return  RetVal.EMPTY_ERR; }
	else if(pwd.length < minLength ){ return RetVal.MIN_ERR;}
	else if( pwd.length > 16){ return RetVal.MAX_ERR;}
	else{ return RetVal.SUCCESS;}
}

function validateEmail(emailAddr){	
	if(emailAddr.length <1){return RetVal.EMPTY_ERR;}
	else if(emailAddr.length <3 ){return RetVal.MIN_ERR;}
	else if( emailAddr.length >97){return RetVal.MAX_ERR;}
	else{ 					
			var validRegExp = /^([a-zA-Z0-9]{1}[\w\-\/&\*\+~%$!=\?#'\^\`{}|]*)(\.[\w\-\/&\*\+~%$!=\?#'\^`{}|]+)*@([\w\-\/&\*\+~%$!=\?#'\^`{}|]+)((\.[\w\-\/&\*\+~%$!=?#'\^`{}|]+)+)$/;
			var result=(validRegExp.test(emailAddr)) ? RetVal.SUCCESS : RetVal.INVALID_ERR ;	
			return result;		
	}	
}

function validateLoginId(loginId){
	var regExp = /@/;		
	var result= regExp.test(loginId) ? validateEmail(loginId) : validateSN(loginId);	
	return result;
}

function snsInfoPopUp(mode, pathOrTitleString, bodyString) {
	var newUrl;    
    var pattern = /\?/;
    var adjustedPathOrTitleString = pathOrTitleString.replace(pattern,"&");	
	if (mode==0) {  newUrl = "/help/infoPopUp.psp?title=" + adjustedPathOrTitleString + "&body=" + bodyString;}
	else if (mode==1) { newUrl=pathOrTitleString;}
	else { return;}		
	window.onerror = null;
	var x = 0, y = 0;
	if (document.all) {	x = window.screenLeft + 30;	y = window.screenTop - 50;}
	else if (document.layers) {x = window.screenX + 30;y = window.screenY + 75;}
	if (y <= 0) { y = 10;}        
    var propString = "scrollbars=yes,width=565,height=275,resizable=yes, top=" + y + ",screenY=" + y + ",left=" + x + ",screenX=" + x;
	var newwin = window.open(newUrl,"popup",propString);
	if (window.focus) {	newwin.focus();	}
	return;
}

function snsCheckSignInForm(loginForm,loginErr,pwdErr){
var loginId = loginForm.loginId;
var password =loginForm.password;
var loginIdVal = loginId.value;
var errCode, result;
errCode = validateLoginId(loginIdVal);
result =(errCode == RetVal.SUCCESS)? true:false;  
if(!result){alert(loginErr[errCode]);loginId.focus();return false;}
errCode = valPassword(password.value,3);
result = (errCode == RetVal.SUCCESS) ? true : false;  
if(!result){alert(pwdErr[errCode]);password.value="";password.focus();return false;}
  return true;
}

function handleUrl(url){document.location.href = url;}

function stripOffAOLDomains(loginId){
var id=trimString(loginId.value);
var splitArr = id.match("^(.+)@(.+)$");
	if(splitArr != null && splitArr.length ==3){
	  	var domain=splitArr[2].toLowerCase();	 
	  	if(domain=="aol.com" || domain =="aim.com" || domain=="netscape.net"){ loginId.value=splitArr[1];}
	  	else {loginId.value=id;}
	  }else{loginId.value=id;}
}


function validateSigninForm(loginForm){
var pwderr = new Array(4);
pwderr[RetVal.EMPTY_ERR]="You must enter a value for Password.";
pwderr[RetVal.MIN_ERR]="Password you entered is too short."; 
pwderr[RetVal.MAX_ERR]="Password must not be longer than 16 characters.";
pwderr[RetVal.INVALID_ERR]="Password you entered is invalid. A Valid password should contain 4-16 letters or numbers.";
var err = new Array(4);
var result;
var loginId = loginForm.loginId;
stripOffAOLDomains(loginId);
	if((/@/).test(loginId.value)){  
 		err[RetVal.EMPTY_ERR]="You must enter a value for E-mail Address.";
        err[RetVal.MIN_ERR]="E-mail Address you entered is too short."; 
        err[RetVal.MAX_ERR]="E-mail Address must not be longer than 97 characters.";
        err[RetVal.INVALID_ERR]="E-mail Address you entered is invalid. A valid E-mail address should look like: joe@aol.com. Please be sure that the E-mail Address doesn't contain any spaces.";
     }
    else{
        err[RetVal.EMPTY_ERR]="You must enter a value for Screen Name.";
        err[RetVal.MIN_ERR]="ScreenName you entered is too short."; 
        err[RetVal.MAX_ERR]="ScreenName must not be longer than 16 characters.";
        err[RetVal.INVALID_ERR]="ScreenName you entered is invalid. A valid Screen Name consists of 3-16 characters and can contain letters, numbers, spaces, and must start with a letter (e.g., johndoe123). Please re-type your Screen Name.";     
     }
	
result=snsCheckSignInForm(loginForm,err,pwderr);
return result;
}



<form name="loginForm" method="POST" action="/_cqr/login/login.psp" onsubmit="return validateSigninForm(this);">

...

             <label for="pwdlabel" >Password:</label>
             <input type="password" name="password" maxlength="23" size="25" tabindex="2" value="" class="inputBox" id="pwdlabel">

...