获取当前 url 查询字符串中的参数的方法

function getUrlParams(query) {
    var params = {};
    query = query || window.location.search;
    query.replace(/([^&=?]+)=([^&]+)/g, function(match, $1, $2) {
        params[$1] = $2;
        return match;
    });
    return params;
}