JS獲取QueryString(Jquery)

$(document).ready(function () {
 

   $("#sonpage_title").html(decodeURI(getQueryStringByName('title')));
});

function getQueryString() {
    var result = location.search.match(new RegExp("[\?\&][^\?\&]+=[^\?\&]+", "g"));
    for (var i = 0; i < result.length; i++) {
        result[i] = result[i].substring(1);
    }
    return result;
}
//根據QueryString參數名稱獲取值
function getQueryStringByName(name) {
    var result = location.search.match(new RegExp("[\?\&]" + name + "=([^\&]+)", "i"));
    if (result == null || result.length < 1) {
        return "";
    }
    return result[1];
}
//根據QueryString參數索引獲取值
function getQueryStringByIndex(index) {
    if (index == null) {
        return "";
    }
    var queryStringList = getQueryString();
    if (index >= queryStringList.length) {
        return "";
    }
    var result = queryStringList[index];
    var startIndex = result.indexOf("=") + 1;
    result = result.substring(startIndex);
    return result;
}