How can I use Multi Media Uploader in the WordPress Plugins?

<script language="JavaScript">
jQuery(document).ready(function($) {
    jQuery('#upload_image_button').click(function() {
        formfield = jQuery('#upload_image').attr('name');
        tb_show('', 'media-upload.php?type=image&TB_iframe=true');
        return false;
    });

    window.send_to_editor = function(html) {
        imgurl = jQuery('img', html).attr('src');
        jQuery('#upload_image').val(imgurl);
        tb_remove();
    };

});
                    </script>
<input id="upload_image" style=" margin-left:303px;" type="text" size="36" name="upload_image_template" value="<?php echo get_option('upload_image_template'); ?>" />
                        <input id="upload_image_button" type="button" value="Browse" />

I try to add the multi uploading options in the wordpress plugins I repeated this code in the plugin(two times) only changing the id name.
Whenever I try to upload a image that media frame comes and the uploading process are did successfully. But Insert Into Post fetch the correct url but pasted in different input box. For example:

[text box1] [browse Button]
[text box2] [browse button]

When I upload image with Text Box One that [insert post] that image path is shown in [text box 2] I am Not Sure Whether the Problem is mine or that script didn’t support multi file upload option.