How to get Floating DIVs inside fixed-width DIV to continue horizontally?

Question

I have a container DIV with a fixed height and width (275x1000px). In this DIV I want to put multiple floating DIVs each with a width of 300px, and have a horizontal (x-axis) scrollbar appear to allow the user to scroll left and right to view everything.

This is my CSS so far:

div#container {
    height: 275px;
    width: 1000px;
    overflow-x: auto;
    overflow-y: hidden;
    max-height: 275px;
}

div#container div.block {
    float: left;
    margin: 3px 90px 0 3px;
}

The problem is that the floating DIVs will not continue past the width of the container. After putting three of the floating DIV's they will continue on beneath. If I change overflow-y to auto, then the vertical scrollbar appears and I can scroll down.

How can I change this to make the floating DIVs continue on without going beneath each other?

Answer 1

div#container {
    height: 275px;
    width: 1000px;
    overflow: auto;
    white-space: nowrap;
}

div#container span.block {
    width: 300px;
    display: inline-block;
}

The trick here is only elements that behave as inline by default will behave properly when set to inline-block in Internet Explorer, so the inner containers need to be <span> instead of <div>.