var bCheckNumbers = true;
var bCheckUpperCase = true;
var bCheckLowerCase = true;
var bCheckPunctuation = true;
var nPasswordLifetime = 365;

function checkPassword(strPassword)
{
	nCombinations = 0;
	
	if (bCheckNumbers)
	{
		strCheck = "0123456789";
		if (doesContain(strPassword, strCheck) > 0) 
		{ 
        		nCombinations += strCheck.length; 
    		}
	}
	
	if (bCheckUpperCase)
	{
		strCheck = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
		if (doesContain(strPassword, strCheck) > 0) 
		{ 
        		nCombinations += strCheck.length; 
    		}
	}
	
	if (bCheckLowerCase)
	{
		strCheck = "abcdefghijklmnopqrstuvwxyz";
		if (doesContain(strPassword, strCheck) > 0) 
		{ 
        		nCombinations += strCheck.length; 
    		}
	}
	
	if (bCheckPunctuation)
	{
		strCheck = ";:-_=+\|//?^&!.@$£#*()%~<>{}[]";
		if (doesContain(strPassword, strCheck) > 0) 
		{ 
        		nCombinations += strCheck.length; 
    		}
	}
	
    	var nDays = ((Math.pow(nCombinations, strPassword.length) / 500) / 2) / 86400;
 
	var nPerc = nDays / nPasswordLifetime;
	
	return nPerc;
}
 
function runPassword(strPassword, strFieldID) 
{
	nPerc = checkPassword(strPassword);
	
    	var ctlBar = document.getElementById(strFieldID + "_bar"); 
    	var ctlText = document.getElementById(strFieldID + "_text");
    	if (!ctlBar || !ctlText)
    		return;
    		
    	var nRound = Math.round(nPerc * 100);
	if (nRound < (strPassword.length * 5)) 
	{ 
		nRound += strPassword.length * 5; 
	}
	if (nRound > 100)
		nRound = 100;
    	ctlBar.style.width = nRound + "%";
 
 	if (nRound > 95)
 	{
 		strText = "Çok Güçlü";
 		strColor = "#3bce08";
 	}
 	else if (nRound > 75)
 	{
 		strText = "Güçlü";
 		strColor = "orange";
	}
 	else if (nRound > 50)
 	{
 		strText = "Zayıf";
 		strColor = "#ffd801";
 	}
 	else
 	{
 		strColor = "red";
 		strText = "Çok Zayıf";
 	}
	ctlBar.style.backgroundColor = strColor;
	ctlText.innerHTML = "<span style='color: " + strColor + ";'>" + strText + "</span>";
}
 
function doesContain(strPassword, strCheck)
 {
    	nCount = 0; 
 
	for (i = 0; i < strPassword.length; i++) 
	{
		if (strCheck.indexOf(strPassword.charAt(i)) > -1) 
		{ 
	        	nCount++; 
		} 
	} 
 
	return nCount; 
}