function getCookie(b) {
var d = b + "=";
var e = document.cookie.indexOf(d);
if (e == -1) {
return null;
}
var a = document.cookie.indexOf(";", e + d.length);
if (a == -1) {
a = document.cookie.length;
}
var c = document.cookie.substring(e + d.length, a);
//乱码
//return unescape(c);
// 解决乱码问题
return decodeURI(c);
}