[Plugin: WP Lightbox 2] Please work for html code

so far I always used
<img src="link" />
not
<a href="link"> <img src="link" /> </ a>

now a huge number of posts can not be changed
please support code <img src="link"/>
Reference plugin http://ww.wp.xz.cn/extend/plugins/images-lazyload-and-slideshow/

Thank!