$(document).ready(function(){

    $(".mainmenu_item").hover(
      function () {
        $(this).css("height","39px");
        $(this).css("background-color","#0053A0");
      },
      function () {
        $(this).css("height","35px");
        $(this).css("background-color","#88817f");
      }
    );
     $(".mainmenu_item").click(function(event) {
           event.preventDefault();
           event.stopPropagation();
           window.open($(this).find("a").attr("href"),"_self");
       });
  });