var pSpacerImg = new Image();
var pStrengthImg_1 = new Image();
var pStrengthImg_2 = new Image();
var pStrengthImg_3 = new Image();
var pStrengthImg_4 = new Image();
var pStrengthImg_5 = new Image();

pSpacerImg.src = "/proimages/spacer.gif";
pStrengthImg_1.src = "/proimages/strength_1.gif";
pStrengthImg_2.src = "/proimages/strength_2.gif";
pStrengthImg_3.src = "/proimages/strength_3.gif";
pStrengthImg_4.src = "/proimages/strength_4.gif";
pStrengthImg_5.src = "/proimages/strength_5.gif";


function ascii_value (c) {
	// restrict input to a single character
	c = c . charAt (0);
	// loop through all possible ASCII values
	var i;
	for (i = 0; i < 256; ++ i){
		// convert i into a 2-digit hex string
		var h = i . toString (16);
		if (h . length == 1)
			h = "0" + h;

			// insert a % character into the string
			h = "%" + h;
				// determine the character represented by the escape code
			h = unescape (h);
				// if the characters match, we've found the ASCII value
			if (h == c)
				break;
		}
		return i;
}

function checkPasswordValue(passWord, clsName){
	var strength = 0;
	var spinstance= 0;
	var instance = 0;
	var numinstance= 0;
	var caps = "false";
	var smallcaps = "false";	
	var mixcase;
	var newpassWord;
	var newuserName;
	newpassWord = passWord.value.toLowerCase();

	for(k=0;k<passWord.value.length;k++){
		asciiChar = ascii_value(passWord.value.substr(k,(k+1)));
		if(k!=0 && passWord.value.length >2){
			//to check consecutive repeatition of characters			
			if(passWord.value.substr((k-1),k)==passWord.value.substr(k,(k+1))){
				
				strength = strength-10;
			}

		}						
		if(((asciiChar>=33)&&(asciiChar<=47))
		||((asciiChar>=58)&&(asciiChar<=64))
	    	||((asciiChar>=91)&&(asciiChar<=96))
		||((asciiChar>=123)&&(asciiChar<=125))){
			if(spinstance != 1){
				strength = strength+10;	
				spinstance = 1;
			}
		}
		if((asciiChar>=48)&&(asciiChar<=57)){
			if(numinstance != 1){
				strength = strength+2;	
				numinstance = 1;
			}
		}
		if((asciiChar>=65)&&(asciiChar<=90)){
			caps = "true";
			strength = strength + 2;
		}
		if((asciiChar>=97)&&(asciiChar<=122)){
			smallcaps = "true";
			strength = strength + 2;
		}
	}
	if((caps=="true")&&(smallcaps=="true")){
		strength = strength + 6;
		mixcase = "true";		
	}
	if((caps=="true")&&(smallcaps=="true")&&(numinstance==1)){
		strength = strength + 6;	
	}
	if((caps=="true")&&(smallcaps=="true")&&(spinstance==1)){
		strength = strength + 6;	
	}
	if((caps=="true")&&(smallcaps=="true")&&(spinstance==1)&&(numinstance==1)){
		strength = strength + 6;	
	}		
	if(passWord.value.length==0){
		strength=0;
	}
	if(passWord.value.length<=5){
		strength=3;
	}
	if((passWord.value.length>5)&&(passWord.value.length<10)){
		strength= 5 ;
	}
	if(passWord.value.length>=10){
		strength= 7;
		if(strength>=7){
			strength = strength + passWord.value.length;
		}
	}
	if(newpassWord==newuserName){ 
		strength = 0;
	}
	if((passWord.value=='password')||(passWord.value=='test')||(passWord.value=='')){
		strength = 0;
	}
	if(!isNaN(passWord.value)){
		//Password with only numbers are not allowed
		strength = 0;
	}
	showStrength(strength,clsName);
}

function showStrength(strength, clsName){
	strengthImage = document.getElementById('strengthImgId');
	strengthText = document.getElementById('strengthTxTId');
	if(strength<=0){	
		strengthImage.src = pSpacerImg.src;
		strengthText.innerHTML = 'Stength: <FONT CLASS="' + clsName + '">Insecure</FONT>';			
	}
	if((strength>0)&&(strength<5)){
		strengthImage.src = pStrengthImg_1.src;
		strengthText.innerHTML = 'Stength: <FONT CLASS="' + clsName + '">Too Short</FONT>';
	}
	if((strength>=5)&&(strength<10)){	
		strengthImage.src = pStrengthImg_2.src;
		strengthText.innerHTML = 'Stength: <FONT CLASS="' + clsName + '">Weak</FONT>';
	}
	if((strength>=10)&&(strength<15)){	
		strengthImage.src = pStrengthImg_3.src;
		strengthText.innerHTML = 'Stength: <FONT CLASS="' + clsName + '">Fair</FONT>';
	}
	if((strength>=15)&&(strength<20)){	
		strengthImage.src = pStrengthImg_4.src;
		strengthText.innerHTML = 'Stength: <FONT CLASS="frmPassCap">Good</FONT>';
	}
	if((strength>=20)&&(strength<25)){	
		strengthImage.src = pStrengthImg_5.src;
		strengthText.innerHTML = 'Stength: <FONT CLASS="frmPassCap">Strong</FONT>';
	}
}