//封装函数getUrlParams, 将URL地址的参数解析为对象
function getUrlParams(url){
    let obj = {};

    if(url.indexOf('?') === -1){
        return obj;
    }

    let first_res = url.split('?')[1];
    let second_res = first_res.split('&');

    for(let i in second_res){
        third = second_res[i].split('=');
        obj[third[0]] = third[1];
    }
    return obj;
}