// Password strength meter
// This 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/
//
// Angepasst von Sindre Wimberger [2007.06.14]

function passwordStrength(password)
{
    score = 0 
    
    //password < 6
    if (password.length < 7 ) { return 1 }
    
    //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 2 
    if (score < 68 )  return 3
    return 4
}
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
}
function statchange(value) {
	$('result').setAttribute("class", "");
	$('reg-password').setAttribute("class", "");
	stat = passwordStrength(value);
	switch (stat) {
	  case 1:
		message = ' - zu Kurz'; 
		styleclass = 'bad';
		break;
	  case 2:
		message = ' - Schwach';
		styleclass = 'weak';
		break;
	  case 3:
		message = ' - Ausreichend';
		styleclass = 'good';
		break;
	  case 4:
		message = ' - Stark';
		styleclass = 'strong';
		break;
	  default:
		message = '';
		styleclass = '';
		break;
	}
	$('result').update(message);
	$('result').addClassName(styleclass);
	$('reg-password').addClassName(styleclass);
}
function startcheck() {
	if($('result')) {
	Event.observe('reg-password', 'keypress', function(){statchange($('reg-password').getValue())});
	}
}
addEvent(window,'load',startcheck);