Generate password

var lowerCase = 'abc';
var upperCase = 'ABC';
var symbols = '*!?';

//make strings array
lowerCase = lowerCase.split('');
upperCase = upperCase.split('');
symbols   = symbols.split('');

function selectRandom(set){
	return set[Math.floor(Math.random() * set.length)];
}

function generatePassword(options){
	var passwordOutput = '';

	for(var i = 0; i < options.length; i++){
		//shuffle
		var randomIndex = Math.floor(Math.random() * options.characterSet.length);
		var randomCharacterFromSet = options.characterSet[randomIndex];
		var randomCharacter = selectRandom(randomCharacterFromSet);

		passwordOutput+=randomCharacter;
	}

	return passwordOutput;
}

generatePassword({
	length : 10,
	characterSet : [lowerCase, upperCase, symbols],
});