HTML界面间传递参数以及中文乱码

//url传递参数
var title=$(this).val();
var change=window.btoa(window.encodeURIComponent(title));
mui.alert(change);
mui.openWindow({
url: '/HNUST/search.html?title='+change+'¤tPage=0',
id:'info'

//正则匹配获取参数
function getQueryString(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
var r = window.location.search.substr(1).match(reg);
if (r != null) return unescape(r[2]); return null;
}