How do simplify megamenu this jQuery code? -

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hi i'm trying simplify code can't think way it, ideas? mega mega

$(function() {     $('#globalnavigation').find("a").bind({         click: function() {             if (".submenu:hidden") {                 $(".submenu").css("display", "block");             }             if ($('a[href$="#a-menu"]')) {                 $(this).addclass("active");                 $("#services-menu").css("display", "none");                 $("#innovations-menu").css("display", "none");                 $("#insights-menu").css("display", "none");                 $("#professionals-menu").fadein(750);             }             if ($('a[href$="#b-menu"]')) {                 $(this).addclass("active");                 $("#professionals-menu").css("display", "none");                 $("#innovations-menu").css("display", "none");                 $("#insights-menu").css("display", "none");                 $("#services-menu").fadein(750);             }             if ($('a[href$="#c-menu"]')) {                 $(this).addclass("active");                 $("#services-menu").css("display", "none");                 $("#innovations-menu").css("display", "none");                 $("#professionals-menu").css("display", "none");                 $("#insights-menu").fadein(750);             }             if ($('a[href$="#d-menu"]')) {                 $(this).addclass("active");                 $("#services-menu").css("display", "none");                 $("#professionals-menu").css("display", "none");                 $("#insights-menu").css("display", "none");                 $("#innovations-menu").fadein(750);             }         }     }); });

css:

.submenu-content {   display: none; }

html:

<nav id="globalnavigation">              <ul>         <li><a id="menu-item-a" href="#professionals-menu">professionals</a></li>         <li><a id="menu-item-b" href="#services-menu">services</a></li>         <li><a id="menu-item-c" href="#insights-menu">insights</a></li>         <li><a id="menu-item-d" href="#innovation-menu">innovation</a></li>     </ul> </nav>  <section class="submenu" style="display: block;">     ...     <div class="submenu-content" id="submenu-content-a">     <div class="submenu-content" id="submenu-content-b">     <div class="submenu-content" id="submenu-content-c">     <div class="submenu-content" id="submenu-content-d">     ... </section>

javascript:

    $('#globalnavigation').find("a").click(function () {         $(this).addclass("active");                 $('.submenu').show();         $('.submenu-content').hide();          var id = $(this).attr('id').replace('menu-item-', '');         $('#submenu-content-' + id).fadein(750);     });

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