Jquery显示并隐藏

Question

$('#TOTSBILT').click(function(){
    $("#Vsauceisgenius").show("slow");
    $(".arrow-left").show("slow");
});

为什么它没有显示div我也有这个代码

$("#CTSO").click(function(){
      $("#Vsauceisgenius").hide("slow");
      $(".arrow-left").hide("slow");

没有错误

<div  id="TOTSBILT"  ><img src="../img/lupa.png" ID="ILDSIB" class="OKSD"></div><div id="ATSIMD"><div class="arrow-left" id="JUHBG"></div><div id="Vsauceisgenius"   >
    <img src="../img/x.png" id="CTSO" href="#"><form method="post" action="ppl.php" >
    <input type="text" name="username" placeholder="People" id="IMOHD"><input type="submit" name="Searc" value="Search" id="DPMM">
    </form><P></P>
    <form method="get">
    <input type="text" placeholder="Hashtags" id="IMOHDS"><input type="submit" value="Search" id="DPMMM"></form>
</div>
</div><h1 ID="jcss">2</H1>