Beginning CSS: Cascading Style Sheets for Web Design, 2nd ...

Part II: PropertiesFigure 11-29aFigure 11-29bIn Figure 11-29c, you see that the element with id name dialogue is centered both verticallyand horizontally in the browser window. Having seen this technique, you might wonder if this can beachieved with variable width or variable height content, that is to say, have a with id name dialoguethat doesn’t have a fixed width or height. And the answer is no, the element this technique isapplied to must have a fixed width and height for this technique to succeed. For the overwhelmingmajority of cases, however, this isn’t a problem. You can always overflow content, and provide scrollbars if necessary with the overflow property.442