자바스크립트 마우스오버가 동작하지 않습니다

$(document).ready(function(){
    //변수설정
    var trigger = $("ul.minThumb li a"),
            thumb = $(".photo img");
    //기본설정
    thumb.first().addClass("current");
    //이벤트 설정
    trigger.each(function(){
        $(this).bind("mouseenter focusin", function(){
            $(this).parent().parent().siblings(".photo").find("img").attr("src", $(this).find("img").attr("src").replace("118x90","590x380")); //작은썸네일 크기, 큰 썸네일 크기 순으로 상황에 맞게 수정
            $(this).parent().parent().siblings(".photo").find("img").attr("alt", $(this).find("img").attr("alt"));
        });
    });
});

include_once(G5_LIB_PATH.'/thumbnail.lib.php');


// 게시글보기 썸네일 생성
function get_thumbnail($bo_table, $img, $width, $height=0, $alt, $view=0)
{
    $str = '';

    $file = G5_DATA_PATH.'/file/'.$bo_table.'/'.$img;
    if(is_file($file))
        $size = @getimagesize($file);

    if($size[2] < 1 || $size[2] > 3)
        return '';

    $img_width = $size[0];
    $img_height = $size[1];
    $filename = basename($file);
    $filepath = dirname($file);

    if($img_width && !$height) {
        $height = round(($width * $img_height) / $img_width);
    }

    $thumb = thumbnail($filename, $filepath, $filepath, $width, $height, false, false, 'center', true, $um_value='80/0.5/3');

    if($thumb) {
        $file_url = str_replace(G5_PATH, G5_URL, $filepath.'/'.$thumb);
        $str = '<img src="'.$file_url.'" width="'.$width.'" height="'.$height.'" alt="'.$alt.'">';
    }

    if($view == 1) return $str;
}
?>
<script src="<?php echo $board_skin_url; ?>/script.js"></script>
<link rel="stylesheet" href="<?php echo $board_skin_url; ?>/style.css">
<div class="mara_view_wrap" style="width:<?php echo $width; ?>;">
    <h1 class="subject">
        <?php echo cut_hangul_last(get_text($view['wr_subject'])); ?>
    </h1>
    <div class="thumb">
        <div class="photo"><?php if($view['file']['0']['file']){ ?><?php echo get_thumbnail($bo_table, $view['file'][0]['file'], 590, 380, $view['file'][0]['bf_content'], 1); ?><?php } ?></div>
        <ul class="minThumb">
            <?php for($i = 0; $i <= count($view['file']); $i++) { // 객실 이미지 뷰 ?>
            <?php if($view['file'][$i]['file']){
                get_thumbnail($bo_table, $view['file'][$i]['file'], 590, 380, $view['file'][$i]['bf_content']);
            ?>
            <li><a href="<?php echo $view['file'][$i]['path'] . '/' . $view['file'][$i]['file']; ?>" target="_blank"><?php echo get_thumbnail($bo_table, $view['file'][$i]['file'], 118, 90, $view['file'][$i]['bf_content'], 1); ?></a></li>
            <?php } ?>
            <?php } ?>
        </ul>
    </div>