function passwordStrength(password,username){
	var desc = new Array();
	desc[0] = "Very Weak";
	desc[1] = "Weak";
	desc[2] = "Better";
	desc[3] = "Medium";
	desc[4] = "Strong";
	desc[5] = "Strongest";

	var score   = 0;
	//if password bigger than 6 give 1 point
	if (password.length > 6) score++;
	//if password has both lower and uppercase characters give 1 point	
	if ( ( password.match(/[a-z]/) ) && ( password.match(/[A-Z]/) ) ) score++;
	//if password has at least one number give 1 point
	if (password.match(/\d+/)) score++;
	//if password has at least one special caracther give 1 point
	if ( password.match(/.[!,@,#,$,%,^,&,*,?,_,~,-,(,)]/) )	score++;
	//if password bigger than 12 give another 1 point
	if (password.length > 12) score++;
	// pass == username
	if (password == username) score = 0;
	document.getElementById("passwordDescription").innerHTML = "<p>" + desc[score] + "</p>";
 	document.getElementById("passwordStrength").className = "strength" + score;
}