// Password strength meter v1.0
// Matthew R. Miller - 2007
// www.codeandcoffee.com
// Based off of code from  http://www.intelligent-web.co.uk

// Settings 
// -- Toggle to true or false, if you want to change what is checked in the password
var bCheckNumbers = true;
var bCheckUpperCase = true;
var bCheckLowerCase = true;
var bCheckPunctuation = true;
var nPasswordLifetime = 365;
 
// Check password
function checkPassword(strPassword,str_user_login) {
	var ctlLog = document.getElementById("user_login");
	// Reset combination count
	nCombinations = 0;
	count = 1;
	// Check numbers
	if (bCheckNumbers) {
		strCheck = "0123456789";
		if (doesContain(strPassword, strCheck) > 0) { 
        	nCombinations += strCheck.length; 
        	count += 0.5; 	
    	}
	}
	
	// Check upper case
	if (bCheckUpperCase) {
		strCheck = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
		if (doesContain(strPassword, strCheck) > 0) { 
        	nCombinations += strCheck.length;
        	count += 0.5;
    	}
	}
	
	// Check lower case
	if (bCheckLowerCase) {
		strCheck = "abcdefghijklmnopqrstuvwxyz";
		if (doesContain(strPassword, strCheck) > 0) { 
        	nCombinations += strCheck.length;
        	count += 0.5;	
    	}
	}
	
	// Check punctuation
	if (bCheckPunctuation) {
		strCheck = ";:-_=+\|//?^&!.@$Ј#*()%~<>{}[]";
		if (doesContain(strPassword, strCheck) > 0) { 
        	nCombinations += strCheck.length;
        	count += 0.5;
    	}
	}
	
	// Calculate
	// -- 500 tries per second => minutes 
    var nDays = ((Math.pow(nCombinations,2 ) / 500) / 2) / 86400;
 
	// Number of days out of password lifetime setting
	var nPerc = nDays * 100000000 / nPasswordLifetime;

	if ((count >= 2.5) && (strPassword.length > 6)) {
  		count = 6;
   	}
   	if ((count >= 2.5) && (strPassword.length < 6))	{
   		count = 2.5;
   	}
  
	var nRound = Math.round(nPerc*count);
	  // Influece strPassword.length
	if (nRound < (strPassword.length * 5)) { 
		nRound += strPassword.length; 
	}
	if ( str_user_login == strPassword) {
		nRound = 0;
	}
	return nRound;
} 
// Runs password through check and then updates GUI 
function getPasswordStrength(strPassword, strFieldID,str_user_login) {
	// Check password
	var nRound = checkPassword(strPassword,str_user_login);
	
	// Get controls
   	var ctlBar = document.getElementById(strFieldID + "_bar"); 
   	var ctlText = document.getElementById(strFieldID + "_text");
    var ctlImg = document.getElementById("img");
       
   	if (!ctlBar || !ctlText) {
   		return;
   	}
   
	if (nRound > 100) {
		nRound = 100;
	}
    ctlBar.style.width = nRound + "%";
 
 	// Color and text
 	if (nRound > 95) {
 		strText = "Very Secure";
 		strColor = "#3bce08";
        ctlImg.src="/images/ill_profile_compl_active.gif";
 	} else if (nRound > 70) {
 		strText = "Secure";
 		strColor = "orange";
              ctlImg.src="/images/ill_profile_compl_active_copy_o.gif";
	} else if (nRound > 45) {
 		strText = "Mediocre";
 		strColor = "#ffd801";
        ctlImg.src="/images/ill_profile_compl_active_copy_y.gif";
 	} else {
 		strColor = "red";
 		strText = "Insecure";
        ctlImg.src="/images/ill_profile_compl_active_copy_r.gif";
 	}
	ctlText.innerHTML = "<span style='color: " + strColor + ";'>" + strText + "</span>";
}
 
// Checks a string for a list of characters
function doesContain(strPassword, strCheck) {
    nCount = 0; 
 
	for (i = 0; i < strPassword.length; i++) {
		if (strCheck.indexOf(strPassword.charAt(i)) > -1) { 
			nCount++;
		} 
	} 
 
	return nCount; 
}