iframe要素はブロックレベル要素ではないので margin でセンタリングできません。 センタリングは次のどちらかで実現可能です。 http://jsfiddle.net/fTSYv/ ・text-align: center; でセンタリングする ・display: block; でブロックボックスにして、margin: 0px auto; # Re: htxkr2462000さん
Anyone who has tried to create multiple columns in the past using CSS will already know that this type of layout has been achievable for a long time. However, this has often resulted in the use of hacky techniques and floats. More often that not this has been quite time consuming and definitely not the easiest of layouts to create. The truth is creating multiple columns using CSS has been an extre
This document summarizes a presentation about the Dart programming language. It discusses Dart's design as a structured, flexible and familiar language for developing web and mobile apps. Dart compiles to JavaScript and runs on modern browsers as well as its own VM. It has a large standard library and tools like an IDE, package manager, and documentation generator to support development. Examples
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