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      VB.net 2010 視頻教程 VB.net 2010 視頻教程 VB.net 2010 視頻教程
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      • css教程之聲明

      • 2015-01-23 22:42 來源:未知

      聲明(相關css教程

      屬性
        一個屬性被指定到選擇符是為了使用它的樣式。屬性的例子包括顏色邊界字體
        聲明的是一個屬性接受的指定。例如,屬性顏色能接受值red

       組合

        為了減少樣式表的重復聲明,組合的選擇符聲明是允許的。例如,文檔中所有的標題可以通過組合給出相同的聲明:
      H1, H2, H3, H4, H5, H6 {
        color: red;
        font-family: sans-serif }

       繼承

        實際上,所有在選擇符中嵌套的選擇符都會繼承外層選擇符指定的屬性值,除非另外更改。例如,一個BODY定義了的顏色值也會應用到段落的文本中。
        有些情況是內部選擇符不繼承周圍的選擇符的值,但理論上這些都是特殊的。例如,上邊界屬性是不會繼承的;直覺上,一個段落不會有同文檔BODY一樣的上邊界值。

       注解

        樣式表里面的注解使用C語言編程中一樣的約定方法去指定。CSS1注解的例子如以下格式:
      /* COMMENTS CANNOT BE NESTED */
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