How to make one scroll animation in jQuery without external plugins
<p>I am having a i page web page. It is working fine but no scrolling animation.
how do i make it scroll smoothly. Now it just jumping..
check this url : <a href="http://www.theteamconsultancy.com/team/product_marketing.html" rel="nofollow">http://www.theteamconsultancy.com/team/product_marketing.html</a></p>

<pre><code>    div class="services-nav"&gt;
  &lt;ul&gt;
    &lt;li class="scroll_btn"&gt;&lt;a href="#service-0" data-offset="-200"&gt;business consulting&lt;/a&gt;&lt;/li&gt;
    &lt;li class="scroll_btn"&gt;&lt;a href="#service-1"&gt;product marketing&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href="#service-2"&gt;real estate&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href="#service-3"&gt;event management&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href="#service-4"&gt;healthcare&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href="#service-5"&gt;leagal consulting&lt;/a&gt;&lt;/li&gt;
  &lt;/ul&gt;
&lt;/div&gt;
</code></pre>

<p><strong>CSS</strong></p>

<pre><code>.services-nav {
    position: fixed;
    right: 0;
    top: 250px;
    z-index: 3;
}
.services-nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}
.services-nav ul li {
    background-color: #002E5B;
    border: 1px solid #002E5B;
    border-right: 0;
    margin-bottom: 4px;
    position: relative;
    text-align: center;
}
.services-nav ul li a {
    color: #fff;
    text-transform: uppercase;
    font-size: 11px;
    display: block;
    width: 100%;
    height: 100%;
    padding: 8px 20px 5px;
    text-decoration: none;
}
.services-nav ul li:before {
    right: 101%;
    top: 50%;
    border: solid transparent;
    content: " ";
    height: 0;
    width: 0;
    position: absolute;
    pointer-events: none;
    opacity: 0;
    border-color: #61ADDF;
    border-color: rgba(194, 225, 245, 0);
    border-right-color: #61ADDF;
    border-width: 0px;
    margin-top: 0px;
    -webkit-transition: all .25s ease;
    -moz-transition: all .25s ease;
    -ms-transition: all .25s ease;
    -o-transition: all .25s ease;
    transition: all .25s ease;
}
.services-nav ul li:hover {
    background-color: #61ADDF;
    border-left-color: transparent;
    border-top: 1px solid #61ADDF;
    border-bottom: 1px solid #61ADDF;
}
.services-nav ul li:hover:before {
    opacity: 1;
    border-width: 15px;
    margin-top: -15px;
}
</code></pre>