I'm in a hurry to ignore javascript case lettersIf there is a web god, please help me(Crying)

<li><a><img src="img/location/airport.png"><<h3> Where is the airport?</h3><h3>Where is the airport?</h3></a></li>

$(document).ready(function () {
    $("#search-mini").keyup(function () {

      var k = $(this).val();

      $(".content > ul > li > a").hide();

      var temp = $(".content > ul > li > a > h3:contains('" + k + "')");

      $(temp).parent().show();
    });
 });