获取url后面的参数

function getKeyValue(url) {
        var result = {};
        var reg = new RegExp('([\\?|&])(.+?)=([^&?]*)', 'ig');
        var arr = reg.exec(url);
        while (arr) {
            result[arr[2]] = arr[3];
            arr = reg.exec(url);
        }
        return result;
}