php中的ewebeditor表单调用

 相关参数：<textarea name=content>
模板调用符：$
　　提交新表单的时候用如下代码，结果完全正常：
<form name="frm_HelpMessageAdd" id="frm_HelpMessageAdd" action="manage.php" method="POST" enctype="multipart/form-data">
<input name="content" type="hidden" id="shopProduct_Intro">
<iframe ID="eWebEditor1" src="other/editor/ewebeditor.php?id=shopProduct_Intro&style=standard" frameborder="0" scrolling="no" width="500" HEIGHT="350"></iframe>
<?php
$action = strtolower($_GET["action"]);
if($action == "do")
{
echo htmlspecialchars($_POST["shopProduct_Intro"]);
}
?>
　　打开此ID序号进行修改时出现iframe框中无任何内容，修改页面代码如下：
<?php
$value = $htmlspecialchars("content");
?>
<form name="frm_HelpMessageAdd" id="frm_HelpMessageAdd" action="manage.php" method="POST" enctype="multipart/form-data">
<input name="content" type="hidden" id="shopProduct_Intro" value="<?php echo "$value"; ?>">
<iframe ID="eWebEditor1" src="other/editor/ewebeditor.php?id=shopProduct_Intro&style=standard" frameborder="0" scrolling="no" width="500" HEIGHT="350"></iframe>
<?php
$action = strtolower($_GET["action"]);
if($action == "do")
{
echo htmlspecialchars($_POST["shopProduct_Intro"]);
}
?>