Click Button and show Drop down menu using CSS and jQuery

	<script>


jQuery(document).ready(function() {
   

jQuery('.dropdown button#menu1').on('click',function(){
 var count=0;

if (  jQuery('ul.menu' ).hasClass("active")     ){ 

 jQuery('ul.menu').hide();
  jQuery('ul.menu').removeClass('active');
count=1
}

if(count!=1){
   jQuery('ul.menu').addClass('active');
   jQuery('ul.menu').show();
}




});






});

</script>
<style>
 
 
ul.menu.active {
    height: 150px !IMPORTANT;
    overflow-y: scroll;
}
 
 
.dropdown {
    display: block;
    margin-left: auto !IMPORTANT;
    margin-right: auto;
    width: 120px;
}
.dropdown ul.menu {
    width: 120px;
}
.dropdown ul.menu li.menu-item {
    line-height: 1rem;
    list-style: none;
}
.dropdown button#menu1 {
    width: 120px;
}
.dropdown ul.menu {
    width: 120px;
    margin-top: 0px;
    position: absolute;
}
 
</style>		
<div class="dropdown">
  <button class="btn btn-default dropdown-toggle" type="button" id="menu1" data-toggle="dropdown">Menu
  <span class="caret"></span></button>
  <ul class="menu" style="display:none;">
    
 
	
	<li class="menu-item"><a href="#123">Home</a></li>
    <li class="menu-item"><a href="#0">About</a></li>
    <li class="menu-item"><a href="#0">Shop</a></li>
	<li class="menu-item"><a href="#0">Streamers</a></li>
    <li class="menu-item"><a href="#456">ABC</a></li>
    <li class="menu-item"><a href="#456">DEF</a></li>
    <li class="menu-item"><a href="#0">12345</a></li>
	<li class="menu-item"><a href="#0">Gallery</a></li>
    <li class="menu-item"><a href="#789">Submenu 1</a></li>
                <li class="menu-item"><a href="#0">Submenu 2</a></li>
                <li class="menu-item"><a href="#0">Submenu 3</a></li>
                <li class="menu-item"><a href="#0">Random Text</a></li>
                <li class="menu-item"><a href="#0">Submenu 5</a></li>
                <li class="menu-item"><a href="#0">Submenu 6</a></li>
				<li class="menu-item"><a href="#0">Contact</a></li>
	 		
   </ul>
</div>