How do I stop my auto suggest drop down from showing before searching
<p>Im using jquery to perform a live auto suggest drop down with a search bar on my site. but Im having an issue, how do I stop the auto suggest box from showing when there isnt anything in the field apart from the jquery example info</p>

<p><img src="http://i.stack.imgur.com/znct8.png" alt="enter image description here"></p>

<p>////// HTML form with Jquery</p>

<pre><code>        &lt;div id="searchbox_largesearcher_bg"&gt;

        &lt;div id="searchbox_signalbg"&gt;&lt;/div&gt;

        &lt;form id="large-searcher" action="" method="post"&gt;

        &lt;input name="large-search-form" id="large-search-form" type="text" size="35"  onfocus="if (this.value == 'Search A Genre e.g. &amp;quot;Hip-Hop&amp;quot;') this.value = '';" onblur="if (this.value == '') this.value = 'Search A Genre e.g. &amp;quot;Hip-Hop&amp;quot;';" maxlength="35" value="Search A Genre e.g. &amp;quot;Hip-Hop&amp;quot;"/&gt;

         &lt;input name="login" id="search_btn" class="search" type="submit" value="" /&gt;

         &lt;div id="searchbox_searchicn"&gt;&lt;/div&gt;
        &lt;/form&gt;

        &lt;/div&gt;

        &lt;div class="dropdown"&gt;

            &lt;ul class="results"&gt;&lt;/ul&gt;

        &lt;/div&gt;
</code></pre>

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

<pre><code>.dropdown {
    -moz-border-bottom-colors: none;
    -moz-border-image: none;
    -moz-border-left-colors: none;
    -moz-border-right-colors: none;
    -moz-border-top-colors: none;
    background-color: #F5F5F5;
    border-radius: 5px 5px 5px 5px;
    box-shadow: 0 1px 2px -1px #000000;
    margin-left: 32px;
    margin-top: -12px;
    padding: 0;
    position: absolute;
    width: 460px;
    z-index: 99;
    }


.results {
    border: 1px solid #A2A1A1;
    border-radius: 5px 5px 5px 5px;
    list-style: none outside none;
    padding-bottom: 7px;
    padding-top: 7px;
    width: 458px;

    }

.results li{
    border-bottom: 1px solid #EDEDED;
    color: #A8A8A8;
    cursor: pointer;
    font-family: helvetica neue,helvetica,arial sans-serif;
    margin-left: 20px;
    margin-right: 20px;
    padding-bottom: 14px;
    padding-left: 25px;
    padding-top: 10px;

    }

.results li:hover{
    background: none repeat scroll 0 0 #EEEEEE;
    color: #A8A8A8;

    }   
</code></pre>

<p>//////// Jquery for auto suggest</p>

<pre><code>&lt;script type="text/javascript"&gt;

// Large Index Page Live Returns Searcher

$(document).ready(function(){
$('#large-search-form').keyup(function() {

var search_term = $(this) .attr('value');

$.post('inc/resultsgrabber.php', {search_term:search_term}, function (data) {

$('.results').html(data); 

$('.results li').click(function() {
    var result_value = $ (this) .text();
    $('#large-search-form').attr('value', result_value);
    $('.results').html('');
    });


});


});

});
</code></pre>
