asp.net - css position of button in menu -

i have menu menu looks :

<div class="menucontainer"> <div id="titlebardiv" style="float: left;"> <a>item 1</a> <div id="container">      <input type="button" value="0" class="masterpagenotifier" style="height: 30px;"onclick="notifierbuttonclicked()" />      <input type="hidden" value="" class="mehidden" />     <ul class="selectbox" />     </div> <a>item 2</a> <a>item 3</a> <a>item 4</a> <a>item 5</a> <div> <div> 

as can see in between have div button inside, on click of button, ul class="selectbox" slide down , show items. problem here can menu work on itself, add button in between, button moving down 1 row, , when click on button .menucontainers background gets stretched. want make facebook when notification button clicked.i tryed absolute position on container div, without luck.

css:

   input[type="submit"],     input[type="button"],     button {         background:#5ccd00;     background:-moz-linear-gradient(top,#5ccd00 0%,#4aa400 100%);     background:-webkit-gradient(linear,left top,left bottom,color-stop(0%,#5ccd00),color-stop(100%,#4aa400));     background:-webkit-linear-gradient(top,#5ccd00 0%,#4aa400 100%);     background:-o-linear-gradient(top,#5ccd00 0%,#4aa400 100%);     background:-ms-linear-gradient(top,#5ccd00 0%,#4aa400 100%);     background:linear-gradient(top,#5ccd00 0%,#4aa400 100%);     filter:progid:dximagetransform.microsoft.gradient(startcolorstr='#5ccd00',endcolorstr='#4aa400',gradienttype=0);     padding:10px 15px;     color:#fff;     font-family:'helvetica neue',sans-serif;     font-size:13px;     border-radius:5px;     -moz-border-radius:5px;     -webkit-border-radius:5px;     border:1px solid #459a00;     }  .menucontainer { width: 1000px;  margin-left: auto;  margin-right: auto;  overflow: hidden;  background-color: purple; }   function notifierbuttonclicked() {     if (checked == false) {         checked = true;          getnotificationsforuser();          $('.selectbox').slidetoggle(200).css('bordertop', 'none');         $('.selectbox li').click(function () {             $('.selectbox').slideup(200);         });          //$('.masterpagenotifier').val("0");     }     else if (checked == true) {         checked = false;         $('.selectbox').slideup(200);     }  } 

thats how looks:

you can "container" <div> stay on same line <a> elements adding this:

#container {  display:inline-block; width:50px; } 

i tested in chrome. of course, can't tell if javascript still working after change, because posted not complete ("checked" not defined).