How to hide Boostrap Dropdown submenu when another dropdown menu is clicked?

I am showing bootstrap dropdownmenu and on click of any parent dropdown. I am showing a dropdown menu of another. when I click on a value in the dropdown the child window opens and when I click on the next value in the dropdown the previous chidmenu dropdown does not close. I want to close the previous child menu if any other value of the parent menu is clicked. How do you achieve this? Please, help! thanks in advance

Here is my code:

<div class="dropdown">
    <ul id="ddlTest" class="ddltestdd dropdown-menu" role="menu">
        @foreach (var item in (IEnumerable<SelectListItem>)ViewBag.testresults)
        {
            <li class="dropdown-submenu">
                <span class="dropdown-toggle" data-toggle="dropdown">@item.Text</span>
                <span class="testCaret" aria-hidden="true" style="float:right;margin-top:5px;">
                </span>
                <ul class="ddltestdd dropdown-menu dropup" role="menu" id="testorder_@item.Text">
                    <li>
                        <span class="TestBySubmenu">T1</span>
                    </li>
                    <li>
                        <span class="TestBySubmenu">T2</span>
                    </li>
                </ul>
            </li>
        }
    </ul>
</div>

      

        
        
        
      

    

Jquery:

var testText;
                    $(".dropdown-submenu").click(function () {
                            $(this).find(".dropdown-submenu").removeClass('open');
                    $(".dropdown-submenu:hover > .dropdown-menu").css('display', 'block');
                    testText;= $(this).text();
                    return false;
                });



        $('.dropdown-menu li span').click(function () {

        var Allowpageload = testText;
        if ((Allowpageload == "T1") || (Allowpageload == "T2")) {
          //load page
            $(".dropdown-submenu:hover > .dropdown-menu").css('display', 'none');
            $('[id^="testorder_]').dropdown('toggle');
            $('[data-toggle="dropdown"]').parent().removeClass('open');
            }