如何获取jQueryui对话框scrollTop将对话框内容滚动到顶部

I have a jQueryui dialog which I'm loading in a lot of content (a terms of service agreement) which causes a scrollbar as the content overflows. This is as I would like it to be. However, I would like the scroll bar to be at the top (so users can read from beginnging without having to scroll up) once the dialog is open. the setup for the dialog isI have a jQueryui dialog which I'm loading in a