Generate a random password with 8 chars:

generatePassword(8);

function generatePassword(length){
	//minimum length is 4
	var chars1 = ['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
	var chars2 = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
	var chars3 = ['1','3','4','5','6','7','8','9','0'];
	var chars4 = ['!','@','#','$','%','^','&','*','(',')','-','+'];
	var list = new Array();
	var password = '';
	var part = (length - (length % 4))/4;
	var firstPart = part + (length % 4);
	for(i = 1; i <= firstPart; i++){
		index = Math.floor(Math.random() * chars1.length);
		list.push(chars1[index]);
	}
	for(i = 1; i <= part; i++){
		index = Math.floor(Math.random() * chars2.length);
		list.push(chars2[index]);
	}
	for(i = 1; i <= part; i++){
		index = Math.floor(Math.random() * chars3.length);
		list.push(chars3[index]);
	}
	for(i = 1; i <= part; i++){
		index = Math.floor(Math.random() * chars4.length);
		list.push(chars4[index]);
	}
	list = shuffle(list);
	for(i = 0; i