SOURCE

/**
 * [获取URL中的参数名及参数值的集合]
 * 示例URL:http://htmlJsTest/getrequest.html?uid=admin&rid=1&fid=2&name=小明
 * @param {[string]} urlStr [当该参数不为空的时候，则解析该url中的参数集合]
 * @return {[string]}       [参数集合]
 */
function GetRequest(urlStr) {
    if (typeof urlStr == "undefined") {
        var url = decodeURI(location.search); //获取url中"?"符后的字符串
    } else {
        var url = "?" + urlStr.split("?")[1];
    }
    var theRequest = new Object();
    if (url.indexOf("?") != -1) {
        var str = url.substr(1);
        var strs = str.split("&");
        for (var i = 0; i < strs.length; i++) {
            theRequest[strs[i].split("=")[0]] = decodeURI(strs[i].split("=")[1]);
        }
    }
    return theRequest;
}
var parms_1 = GetRequest("https://detail.tmall.com/item.htm?id=638005051622&rn=75d4c727a775b386c6e5b47414d6153c&abbucket=9");

console.log(parms_1['id']); // '获得ID'