/*
* function to check password strength
*/

function validatePwd(fieldname) {
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//Copyright April 2004 Sani, A. I. (MCSE, MCSA, CCNA)
//sanijean@yahoo.co.uk
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
 
//Initialise variables
var errorMsg = "";
var space  = " ";
//fieldname   = document.myform.password; 
//fieldvalue  = fieldname.value; 
//fieldlength = fieldvalue.length; 
fieldname   = document.getElementById(fieldname);// document.myform.password; 
fieldvalue  = fieldname.value; 
fieldlength = fieldvalue.length; 
 
//It must not contain a space
if (fieldvalue.indexOf(space) > -1) {
     errorMsg += "\nPasswords cannot include a space.\n";
}     
 
//It must contain at least one number character
if (!(fieldvalue.match(/\d/))) {
     errorMsg += "\nStrong passwords must include at least one number.\n";
}
//It must start with at least one letter     
//if (!(fieldvalue.match(/^[a-zA-Z]+/))) {
//     errorMsg += "\nStrong passwords must start with at least one letter.\n";
//}
//It must contain at least one upper case character     
//if (!(fieldvalue.match(/[A-Z]/))) {
//     errorMsg += "\nStrong passwords must include at least one uppercase letter.\n";
//}
//It must contain at least one lower case character
//if (!(fieldvalue.match(/[a-z]/))) {
//     errorMsg += "\nStrong passwords must include one or more lowercase letters.\n";
//}
//It must contain at least one special character
if (!(fieldvalue.match(/\W+/))) {
     errorMsg += "\nStrong passwords must include at least one special character - #,@,%,!\n";
}
//It must be at least 7 characters long.
if (!(fieldlength >= 7)) {
     errorMsg += "\nStrong passwords must be at least 7 characters long.\n";
}
//If there is aproblem with the form then display an error
     if (errorMsg != ""){
  //        msg = "______________________________________________________\n\n";
  //        msg += "Please correct the problem(s) with your trial password test it again.\n";
  //        msg += "______________________________________________________\n";
 //          errorMsg += alert(msg + errorMsg + "\n\n");
 		  errorMsg += alert(errorMsg + "\n\n");
          fieldname.focus();
          return false;
     }
     
     return true;
}
/*end of password function */

<!-- Changes:  Sandeep V. Tamhankar (stamhankar@hotmail.com) -->

/* 1.1.2: Fixed a bug where trailing . in e-mail address was passing
            (the bug is actually in the weak regexp engine of the browser; I
            simplified the regexps to make it work).
   1.1.1: Removed restriction that countries must be preceded by a domain,
            so abc@host.uk is now legal.  However, there's still the 
            restriction that an address must end in a two or three letter
            word.
     1.1: Rewrote most of the function to conform more closely to RFC 822.
     1.0: Original  */

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- edited by markg (markglibres@yahoo.com) -->
<!-- to have an option to display alert -->
<!-- to have an option to override alert message -->

function emailCheck (emailStr,hideAlert,errorMsg) {
	/* The following pattern is used to check if the entered e-mail address
	   fits the user@domain format.  It also is used to separate the username
	   from the domain. */
	var emailPat=/^(.+)@(.+)$/
	/* The following string represents the pattern for matching all special
	   characters.  We don't want to allow special characters in the address. 
	   These characters include ( ) < > @ , ; : \ " . [ ]    */
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	/* The following string represents the range of characters allowed in a 
	   username or domainname.  It really states which chars aren't allowed. */
	var validChars="\[^\\s" + specialChars + "\]"
	/* The following pattern applies if the "user" is a quoted string (in
	   which case, there are no rules about which characters are allowed
	   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
	   is a legal e-mail address. */
	var quotedUser="(\"[^\"]*\")"
	/* The following pattern applies for domains that are IP addresses,
	   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
	   e-mail address. NOTE: The square brackets are required. */
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	/* The following string represents an atom (basically a series of
	   non-special characters.) */
	var atom=validChars + '+'
	/* The following string represents one word in the typical username.
	   For example, in john.doe@somewhere.com, john and doe are words.
	   Basically, a word is either an atom or quoted string. */
	var word="(" + atom + "|" + quotedUser + ")"
	// The following pattern describes the structure of the user
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	/* The following pattern describes the structure of a normal symbolic
	   domain, as opposed to ipDomainPat, shown above. */
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	
	
	/* Finally, let's start trying to figure out if the supplied address is
	   valid. */
	
	/* Begin with the coarse pattern to simply break up user@domain into
	   different pieces that are easy to analyze. */
	var matchArray=emailStr.match(emailPat)
	
	var messageDisplay = "Email address seems incorrect (check @ and .'s)"
	if (matchArray==null) {
	  /* Too many/few @'s or something; basically, this address doesn't
	     even fit the general mould of a valid e-mail address. */
	    
	    if(hideAlert == null)
	    {
			if(errorMsg != null)
				messageDisplay = errorMsg;
			alert(messageDisplay);
			
		}
		return false
	}
	var user=matchArray[1]
	var domain=matchArray[2]
	
	// See if "user" is valid 
	if (user.match(userPat)==null) {
	    // user is not valid
	    if(hideAlert == null)
		    alert("The username doesn't seem to be valid.")
	    return false
	}
	
	/* if the e-mail address is at an IP address (as opposed to a symbolic
	   host name) make sure the IP address is valid. */
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
	    // this is an IP address
		  for (var i=1;i<=4;i++) {
		    if (IPArray[i]>255) {
		        if(hideAlert == null)
			        alert("Destination IP address is invalid!")
			return false
		    }
	    }
	    return true
	}
	
	// Domain is symbolic name
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		if(hideAlert == null)
			alert("The domain name doesn't seem to be valid.")
	    return false
	}
	
	/* domain name seems valid, but now make sure that it ends in a
	   three-letter word (like com, edu, gov) or a two-letter word,
	   representing country (uk, nl), and that there's a hostname preceding 
	   the domain or country. */
	
	/* Now we need to break up the domain to get a count of how many atoms
	   it consists of. */
	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || 
	    domArr[domArr.length-1].length>3) {
	   // the address must end in a two letter or three letter word.
	   if(hideAlert == null)
		   alert("The address must end in a three-letter domain, or two letter country.")
	   return false
	}
	
	// Make sure there's a host name preceding the domain.
	if (len<2) {
	   var errStr="This address is missing a hostname!"
	   if(hideAlert == null)
		   alert(errStr)
	   return false
	}
	
	// If we've gotten this far, everything's valid!
	return true;
}