(January 11) http://www.handandaily.com
首先我要說的是部落格園的速度開啟的很慢,深圳南山的
如果你知道這種技術，那就不用進來了，
1.首先你先開啟下面兩個串連:(下面連結不是一般的圖片，無毒無廣告)
http://static.ak.facebook.com/images/sprite/icons.png?db3
http://www.google.com/images/nav_logo3.png
剛才在Google搜尋的首頁，發現在body的onload裡有這麼一句：
if(document.images){new Image().src='/images/nav_logo3.png'}
那麼來看看這個http://www.google.com/images/nav_logo3.png是個啥？
就是它：
Css Sprites，就是將頁面中所有css裝飾圖合并成一個較大的圖，然後用到特定的css裝飾圖的時候就利用css的background-image:大圖,background-position:小圖在大圖中的x位置,小圖在大圖中的y位置
優點:利用Css Sprites可以提升網站的效能，普通製作方式下的大量圖片，現在合并成一個圖片，大大減少了HTTP的串連數。HTTP串連數對網站的載入效能有重要影響。
按照yahoo的 rules for high performance web sites的原則，應當較少Client與Server端間的HTTP Request次數。
通過CSS Sprites方法將多張圖片組裝成單獨的一張圖片，可以有效減少HTTP請求的次數。
關於更多的CSS Sprites
http://www.handandaily.com/post/cat_8.html
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