【解析location.search】

[kind-hearted]

function parseSearch(search) {
    if (search[0] === "?") {
        search = search.slice(1);
    }

    var reg = /[^&]+=[^&]+/g;
    var matches = search.match(reg);
    var res = {};

    if (matches) {
        for (var i = 0, ilen = matches.length; i < ilen; i++) {
            var str = matches[i];
            var index = str.indexOf("=");
            var key = str.slice(0, index).trim();
            var value = str.slice(index + 1);

            res[key] = value;
        }
    }

    return res;
}