how to avoid referer checking in django?

Question

document.getElementById() returns only one item (the first item, because all images in you code have same id). Use another methods like document.getElementsByClassName.

Try following code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
{% load staticfiles %}

<html>
    <head>
        <meta charset="utf-8" />
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
        <script type="text/javascript" src="{% static "js/ReferrerKiller.js" %}"></script>
        <title>island</title> 
    </head>

    <body> 
        <h1> nanpa </h1>
        <br/>

    {% for entrySummary in entrySummaryList %} 
        title :
        <a href="{{entrySummary.entry_link}}">{{ entrySummary.entry_title }}</a>
        {{ entrySummary.entry_pub_date }} <br/>

        description : {{ entrySummary.entry_description }} <br/>
        image : <span class="image_kill_referrer"></span>
    {% endfor %} 
        <script>
        var i, images = document.getElementsByClassName('image_kill_referrer');
        var urls = [
    {% for entrySummary in entrySummaryList %} 
            "{{ entrySummary.entry_representaion_img }}",
    {% endfor %}
            "DUMMY"
        ];
        for (i = 0; i < images.length; i++) {
            images[i].innerHTML = ReferrerKiller.imageHtml(urls[i]);
        }
        </script>
    </body>
</html>

Or, use different id for each image:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
{% load staticfiles %}
<html> 
    <head>
        <meta charset="utf-8" />
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
        <script type="text/javascript" src="{% static "js/ReferrerKiller.js" %}"></script>
        <title>island</title> 
    </head>
    <body> 
        <h1> nanpa </h1> 
        <br/>

    {% for entrySummary in entrySummaryList %} 
        title : 
        <a href="{{entrySummary.entry_link}}">{{ entrySummary.entry_title }}</a>
        {{ entrySummary.entry_pub_date }} <br/>

        description : {{ entrySummary.entry_description }} <br/>
        image : <span id="image_kill_referrer{{ forloop.counter }}"></span> 
        <script>
        document.getElementById('image_kill_referrer{{ forloop.counter }}').innerHTML = ReferrerKiller.imageHtml("{{
        entrySummary.entry_representaion_img }}");
        </script>   
    {% endfor %}   
    </body> 
</html>