首頁 > 開發者 > JavaScript
標籤：多個 val span input value 事件 button inpu click
一、第一種情況:在<script></script>標籤內調用。
1 <script type="text/javascript"> 2 function add() 3 { 4 sum = 1 + 2; 5 alert(sum); 6 } 7 add();//調用函數，直接寫函數名。 8 </script> 9 10 另一種寫法11 <script type="text/javascript">12 function add(a, b) {13 sum = a + b;14 alert(sum);15 } // 只需寫一次就可以16 add(1, 2);
add(3, 4);//如有多個則會順著顯示
17 </script>
二、第二種情況:在HTML檔案中調用，如通過點擊按鈕後調用定義好的函數。
<html><head><script type="text/javascript"> function add() { sum = 1 + 2; alert(sum); }</script></head><body><form><input type="button" value="點我" onclick="add()"> //按鈕,onclick點擊事件，直接寫函數名</form></body></html>
JavaScript函數調用
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
