Can't get scroll bar to appear on overflow - css

Question

I'm building a MDI WEB application, and have a window created made by a article element, with a header and a section for content. Since it's an MDI app, the article is set to absolute, so it can overlap other windows. I need a scrollbar to appear in the content section, but not in the header.
<article id="win3">
<header> … </header>
<section> … </section>
</article>
CSS:
article {
position: absolute;
min-width: 500px;
width: 918px;
margin: 0px;
padding: 0px;
overflow: hidden;
background-color: white;
border-style: ridge;
border-color: #ddd;
border-width: 4px;
}
article>section {
/* reduce diameter of rounded corner to match the inside curve of the border */
border-radius: 10px;
-moz-border-radius: 10px;
display: block;
overflow: auto;
border: none;
width: 100%;
background-color: white;
padding: 10px 10px 10px 20px;
min-height: 50px;
height: 100%;
}
It looks like the overflow: auto is ignored in Firefox (v 22), but the scrollbar does appear in Chrome.
Any ideas on how I make the scrollbar reliably when needed in the content section?

Answer 1

Your key problem is with padding value, so you need to set width decreasing some percentage in your article>section
article>section {
/* reduce diameter of rounded corner to match the inside curve of the border */
border-radius: 10px;
-moz-border-radius: 10px;
display: block;
overflow: auto;
border: none;
/*width: 100%;*/
width: calc(100% - 30px) /* or set fixed width percentage like 90% */
background-color: white;
padding: 10px 10px 10px 20px;
min-height: 50px;
height: 100%;
}

Answer 2

article {
position: absolute;
min-width: 500px;
width: 918px;
margin: 0px;
padding: 0px;
overflow: hidden;
background-color: white;
border-style: ridge;
border-color: #ddd;
border-width: 4px;
height:100px;
}
article>section {
/* reduce diameter of rounded corner to match the inside curve of the border */
overflow:auto;
height:100%;
border:none;
display: block;
padding: 10px 10px 10px 20px;
min-height:50px;
}