js 获取url参数

//  示例urlStr:http://html/index.html?user=admin&pwd=123456

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 obj = new Object();
    if (url.indexOf("?") != -1) {
        var str = url.substr(1);
        strs = str.split("&");
        for (var i = 0; i < strs.length; i++) {
            obj[strs[i].split("=")[0]] = decodeURI(strs[i].split("=")[1]);
        }
    }
    return obj;
}

var params = getRequest();
console.log(params); //{"user":"admin","pwd":"123456"}