js加密解密

function compile(code) {
	var c = String.fromCharCode(code.charCodeAt(0) + code.length);
	for (var i = 1; i < code.length; i++) {
		c += String.fromCharCode(code.charCodeAt(i) + code.charCodeAt(i - 1));
	}
	return escape(c);
}
function uncompile(code) {
	code = unescape(code);
	var c = String.fromCharCode(code.charCodeAt(0) - code.length);
	for (var i = 1; i < code.length; i++) {
		c += String.fromCharCode(code.charCodeAt(i) - c.charCodeAt(i - 1));
	}
	return c;
}