织梦dedecms将面包屑导航中的首页换成图片的方法

function GetPositionLink($islink=true)    {        if ( defined('DEDEMOB') )        {            $indexpage = "<a href='index.php'>".$this->indexName."</a>";        } else{            $indexpage = "<a href='".$this->indexUrl."'>".$this->indexName."</a>";        }

function GetPositionLink($islink=true)    {        if ( defined('DEDEMOB') )        {            $indexpage = "<a href='index.php'>"."<img src=/"/style/cmsjzy.jpg/" class=/"cmsjzy/" alt=/"Home/">"."</a>";        } else{            $indexpage = "<a href='".$this->indexUrl."'>"."<img src=/"/style/cmsjzy.jpg/" class=/"cmsjzy/" alt=/"Home/">"."</a>";        }