try & catch

Try...Catch Statement

The try...catch statement allows you to test a block of code for errors. The try block
contains the code to be run, and the catch block contains the code to be
executed if
an error occurs.

Syntax

try<br />{<br />//Run some code here<br />}<br />catch(err)<br />{<br />//Handle errors here<br />}

Note that try...catch is written in lowercase letters. Using uppercase
letters will generate a JavaScript error!

leature1

css中關於超鏈結的四個屬性一般正常順序為：link，visited，hover，active，即


原始CSS 其意義如下


一般連結：｛顏色：藍色｝
參觀過的連結：｛顏色：灰色｝
正在執行的連結：｛顏色：綠色｝
當滑鼠移到連結上：｛顏色：紅色｝