求助，Smarty中的 popup_init 无法加载问题

[kaen98]

模板文件中代码：

<h1>popup_init演示</h1>

{popup_init src='/overlib410/overlib.js'}
<a href="#" {popup text="测试正常么"}></a>

报错信息：

Fatal error: Uncaught --> Smarty Compiler: Syntax error in template "E:\myenv\Apache\htdocs\smarty\templates\popup.tpl" on line 1 "{popup_init src='/overlib410/overlib.js'}" unknown tag "popup_init" <-- thrown in E:\myenv\Apache\htdocs\smarty\libs\sysplugins\smarty_internal_templatecompilerbase.php on line 1

怎么解决啊？度娘也爱莫能助！