標籤：http io os ar java sp on cti html
<html><head><script type="text/javascript">function disp_alert(){alert("再打個招呼。這裡示範了" + "\n" + "如何在訊息框中添加折行。")}</script></head><body><input type="button" onclick="disp_alert()" value="顯示訊息框" /></body></html> 定義和用法
alert() 方法用於顯示帶有一條指定訊息和一個 OK 按鈕的警告框。
文法
alert(message)
| 參數 | 描述 |
|---|---|
| message | 要在 window 上彈出的對話方塊中顯示的純文字（而非 HTML 文本） |
<html><head><script type="text/javascript">function display_alert() { alert("I am an alert box!!") }</script></head><body><input type="button" onclick="display_alert()"value="Display alert box" /></body></html> TIY
顯示一個對話方塊
顯示帶有折行的對話方塊
當所顯示的對象是一個陣列變數的時候,這個陣列變數的元素將由逗號分隔之後一行顯示出來
HTML DOM alert() 方法
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