// Password strength meter
// This jQuery plugin is written by firas kassem [2007.04.05]
// Firas Kassem  phiras.wordpress.com || phiras at gmail {dot} com
// for more information : http://phiras.wordpress.com/2007/04/08/password-strength-meter-a-jquery-plugin/

var none = '&nbsp;<br /><div style="height:5px; width:auto; background:#e0e0e0;"></div>';

var shortPass = '<span style="color:#676767; font-weight:bold;"> Too short </span><br />'
				+'<div style="height:5px; width:auto; background:#e0e0e0;"><div style="height:5px; width:0px; background:#676767;">&nbsp;</div></div>';
				
var badPass = '<span style="color:#e71a1a; font-weight:bold;"> Bad </span><br />'
				+'<div style="height:5px; width:auto; background:#e0e0e0;"><div style="height:5px; width:20%; background:#e71a1a;">&nbsp;</div></div>';
				
var goodPass = '<span style="color:#6699CC; font-weight:bold;"> Good </span><br />'
				+'<div style="height:5px; width:auto; background:#e0e0e0;"><div style="height:5px; width:70%; background:#6699CC;">&nbsp;</div></div>';
				
var strongPass = '<span style="color:#008000; font-weight:bold;"> Strong </span><br />'
				+'<div style="height:5px; width:auto; background:#e0e0e0;"><div style="height:5px; width:100%; background:#008000;">&nbsp;</div></div>';

function passwordStrength(password,username)
{
    score = 0 
    
	//password == 0
    if (password.length == 0 ) { return none}
	
    //password < 4
    if (password.length < 4 ) { return shortPass }
    
    //password == username
    if (password.toLowerCase()==username.toLowerCase()) return badPass
    
    //password length
    score += password.length * 4
    score += ( checkRepetition(1,password).length - password.length ) * 1
    score += ( checkRepetition(2,password).length - password.length ) * 1
    score += ( checkRepetition(3,password).length - password.length ) * 1
    score += ( checkRepetition(4,password).length - password.length ) * 1

    //password has 3 numbers
    if (password.match(/(.*[0-9].*[0-9].*[0-9])/))  score += 5 
    
    //password has 2 sybols
    if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)) score += 5 
    
    //password has Upper and Lower chars
    if (password.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/))  score += 10 
    
    //password has number and chars
    if (password.match(/([a-zA-Z])/) && password.match(/([0-9])/))  score += 15 
    //
    //password has number and symbol
    if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([0-9])/))  score += 15 
    
    //password has char and symbol
    if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([a-zA-Z])/))  score += 15 
    
    //password is just a nubers or chars
    if (password.match(/^\w+$/) || password.match(/^\d+$/) )  score -= 10 
    
    //verifing 0 < score < 100
    if ( score < 0 )  score = 0 
    if ( score > 100 )  score = 100 
    
    if (score < 34 )  return badPass 
    if (score < 68 )  return goodPass
    return strongPass
}

function checkRepetition(pLen,str) {
    res = ""
    for ( i=0; i<str.length ; i++ ) {
        repeated=true
        for (j=0;j < pLen && (j+i+pLen) < str.length;j++)
            repeated=repeated && (str.charAt(j+i)==str.charAt(j+i+pLen))
        if (j<pLen) repeated=false
        if (repeated) {
            i+=pLen-1
            repeated=false
        }
        else {
            res+=str.charAt(i)
        }
    }
    return res
}