背景图像未显示在wordpress'；新闻版'；使用反拉伸时

我已经使用backstretch为我的wordpress站点上的每个页面切换bg图像，除了我的“新闻页面”（即博客功能）之外，一切都很好。即使我已经识别并使用了正确的页面ID，脚本也不想更新它

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="http://www.myurl.co.uk/wp-content/themes/name/bootstrap/js/jquery.backstretch.min.js"></script>

<?php
    if(is_page(2))
    {
        echo '<script>$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_homepage.jpg");</script>';
    } 
    else if(is_page(51))
    {
        echo '<script>$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_food_menu.jpg");</script>';
    }
    else if(is_page(60))
    {
    echo '<script>$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_whats_on.jpg");</script>';
    }
    else if(is_page(53))
    {
    echo '<script>$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_drink_menu.jpg");</script>';
    }
    else if(is_page(57))
    {
    echo '<script>$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_where_when.jpg");</script>';
    }
    else if(is_page(55))
    {
    echo '<script>$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_whats_on.jpg");</script>';
    }
?>

您可能需要将整个内容嵌套在
document.ready
调用中，否则您将试图在任何准备就绪之前初始化它

试试这个：

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="http://www.myurl.co.uk/wp-content/themes/name/bootstrap/js/jquery.backstretch.min.js"></script>

<script>
$(document).ready(function(){
<?php
    if(is_page(2))
    {
        echo '$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_homepage.jpg");';
    } 
    else if(is_page(51))
    {
        echo '$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_food_menu.jpg");';
    }
    else if(is_page(60))
    {
    echo '$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_whats_on.jpg");';
    }
    else if(is_page(53))
    {
    echo '$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_drink_menu.jpg");';
    }
    else if(is_page(57))
    {
    echo '$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_where_when.jpg");';
    }
    else if(is_page(55))
    {
    echo '$.backstretch("http://www.myurl.co.uk/wp-content/themes/name/img/bg_whats_on.jpg");';
    }
?>
});


$（文档）.ready（函数（）{