ecshop问题，高手请进
index.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>无标题文档</title><script type="text/javascript" src="js/transport.js"></script><script type="text/javascript">var process_request = "正在处理您的请求...";</script></head><body><input type="file" id="publisher_file" name="topic" size="1" onchange="fileSubmit();"/><script>function fileSubmit(){ var upload_img = document.getElementById("publisher_file").value; Ajax.call('json.php', 'step=update_img&upload_img='+upload_img, changeImageResponse, 'GET', 'JSON');}function changeImageResponse(result){ alert(result.content);}</script></body></html><?phpif($_REQUEST["step"] == "update_img"){ include_once('includes/cls_json.php'); $json = new JSON; $result = array('error' => 0, 'message' => '', 'content' => '', 'goods_id' => ''); $upload_img = $_REQUEST['upload_img']; $result['content'] = $upload_img; die($json->encode($result));}?>function fileSubmit(){ var upload_img = document.getElementById("publisher_file").value; Ajax.call('json.php', 'step=update_img&upload_img='+upload_img, changeImageResponse, 'GET', 'JSON');}function changeImageResponse(result){ alert(result.content.content);}</script>