設定字體大小

h1 {font-size:2.5em;} /* 40px/16=2.5em */
 h2 {font-size:1.875em;} /* 30px/16=1.875em */
 p {font-size:0.875em;} /* 14px/16=0.875em */

css replace iframe

    
    



    

        
this is a test. this is a test. this is a test. this is a test. 
        this is a test. this is a test. this is a test. this is a test. 
        this is a test. this is a test. this is a test. this is a test. 
        this is a test. this is a test. this is a test. this is a test. 
    

css round corner button

pre標籤中換行

程式碼

<style type='text/css'>
pre {
white-space: pre-wrap; /* css-3 */
white-space: -moz-pre-wrap; /* Mozilla, since 1999 */
white-space: -pre-wrap; /* Opera 4-6 */
white-space: -o-pre-wrap; /* Opera 7 */
word-wrap: break-word; /* Internet Explorer 5.5+ */
}
</style>