Show DIV based on a selection

Show corresponding DIV when a selection in the <select> happens

HTML

<select id="reportsSelect">
    <option value="blank" id="blank" onclick="show(this)"></option>
    <option value="basic" class="basic" onclick="show(this)">Basic</option>
    <option value="inventory" id="inventory" onclick="show(this)">Inventory</option>
    <option value="chargeback" id="chargeback" onclick="show(this)">Chargeback</option>
    <option value="studentJobAccount" id="studentJobAccount" onclick="show(this)">Student Job Account</option>
</select>

<div id="imagingCont">
    <h1>imagingDiv</h1>
    <p>Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.</p>
</div>
<div id="inventoryCont">
    <h1>inventoryDiv</h1>
    <p>Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.</p>
</div>
<div id="chargebackCont">
    <h1>chargebackDiv</h1>
    <p>Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.</p>
</div>
<div id="studentJobAccountDivCont">
    <h1>studentJobAccountDiv</h1>
    <p>Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.</p>
</div>

CSS

h1 {font-weight: bold; font-size: 2em}
.basic{display: none;}

JavaScript

$(function() {
    $.fn.showField = function() {
        var selectVal = document.getElementById(this.val() );
        return this.each(function() {
            $(selectVal).show().siblings('inventory').hide();
        });
    };    
    $('select#reportsSelect').change(function() {
        $(this).showField();
    });
});