问用户的jQuery变更img

EN

<div class="fl edit_options div_img">
<img class="img" src="${admin.img}" width="200px" height="200px" alt="Foto do Administrador" />
<div class="input_photo dropdowndiv"> <span>Alterar Foto</span>

    <br />
    <input type="file" name="file_photo" id="file_photo" value="Alterar Foto" />
</div>
<br />
<p>Administrador: ${admin.username}</p>

$('.dropdowndiv').hide();
        $('.div_img').hover(function() {
            $(this).find('.dropdowndiv').slideUp('fast');
        }, function() {
            $(this).find('.dropdowndiv').slideDown('fast');
        });

    html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
    outline: none;
    text-decoration: none;
}
/* HTML5 display-role reset for older browsers */
 article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
    display: block;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after, q:before, q:after {
    content: none;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}
.fl {
    float: left;
}
.edit_options {
    margin: 50px;
}
.div_img {
    position: relative;
    margin-right: 0px;
    padding-left: 0px;
}
.edit_admin img, .edit_admin p {
    text-align: center;
}
.input_photo {
    position: absolute;
    width: 200px;
    height: 54px;
    bottom: 20px;
    background: rgba(170, 173, 168, 0.9);
    display: table;
}
.input_photo span {
    height: 54px;
    display: table-cell;
    vertical-align: middle;
    text-align: center;
    color: #000000;
}
.input_photo input {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 200px;
    height: 54px;
    z-index: 2;
    opacity: 0;
    filter: alpha(opacity=0);
    cursor: pointer;
}