menubutton query 的URL如何确定的

<div data-toggle="topjui-layout" data-options="fit:true">
<div data-options="region:'center',title:'',fit:false,split:true,border:false,bodyCls:'border_right'" style="width:60%">
<table data-toggle="topjui-datagrid" data-options="id:'ExtendPermissionDg',
singleSelect:true,
selectOnCheck:false,
checkOnSelect:false,
url: '/System/ExtendPermission/GetExtendPermissionList'">
<thead>
<tr>
<th data-options="field: 'PermissionCode', title: '代码', width: 50"></th>
<th data-options="field: 'PermissionName', title: '名称', width: 80, sortable: true"></th>
<th data-options="field: 'DisplayName', title: '显示名称', width: 80, sortable: true"></th>
<th data-options="field: 'Value', title: '模块', width: 80, sortable: true"></th>
<th data-options="field: 'IsExtend' , title: '扩展权限' , width: 80, sortable: true"></th>
</tr>
</thead>
</table>
</div>
<div data-options="region:'east',title:'',fit:false,split:true,border:false,bodyCls:'border_left'" style="width:40%">

</div>
</div>
<div id="ExtendPermissionDg-toolbar" style="height:32px;display:block;" data-options="grid:{type:'datagrid',id:'ExtendPermissionDg'}">
<form id="queryForm" class="search-box" style="float:left">
总公司：<input type="text" name="cbxCorporation" id="cbxCorporation" data-toggle="topjui-combobox" data-options="width: 150,
valueField: 'CompanyID',
textField: 'CompanyName',
panelHeight: 'auto',
url: '@Url.Action("GetCorporation")?CompanyID=0',
childCombobox:{id:'cbxBranch', url:'/System/ExtendPermission/GetCorporation?CompanyID={parentValue}'},
onLoadSuccess:function(data){
if (data) { $(this).iCombobox('setValue', data[0].CompanyID); }
}">
分公司：<input type="text" name="cbxBranch" id="cbxBranch" data-toggle="topjui-combobox" data-options="width: 400,
valueField: 'CompanyID',
textField: 'CompanyName',
panelHeight: 300,
childCombobox:{id:'cbxApp', url:'/System/Application/GetApplicationList?CompanyID={parentValue}'}">
应用：<input type="text" name="cbxApp" id="cbxApp" data-toggle="topjui-combobox" data-options="width: 150,
valueField: 'ApplicationKey',
textField: 'DisplayName',
panelHeight: 'auto'">
<a id="btnSelect" href="javascript:void(0)" data-toggle="topjui-menubutton" data-options="method: 'query',
iconCls: 'fa fa-search',
btnCls: 'topjui-btn-green',
form: { id: 'queryForm' },
grid: { type: 'datagrid', id: 'ExtendPermissionDg' }">查询</a>
<a id="btnSync" href="javascript:void(0)">同步</a>
</form>
</div>
我想问一下这个查询按钮点击后的URL是如何确定的，为什么我这个点完后，URL却是这样的呢https://localhost:44340/System/cbxCorporation=100&cbxBranch=101&cbxApp=E3