解決代碼如下
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DOM(Document Object Model)文檔對象模型,以及文檔的加載 事件、事件句柄 DOM查詢----獲取模型樹中的節點document中的方法,以及節點中的屬性 獲取/修改元素節點的屬性 獲取/修改元素節點的內
//動態改變少數民族的值 function checkSelect(){ var ontion = document.getElementById("nations").value; //alert("少數民族的值爲:"+ont
https://view.officeapps.live.com/op/view.aspx?src=你地址
{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null},"content":[{"typ
{"type":"doc","content":[{"type":"heading","attrs":{"align":"center","level":2},"content":[{"type":"text","text":"堅持原創輸出
{"type":"doc","content":[{"type":"heading","attrs":{"align":null,"level":2},"content":[{"type":"text","text":"前言"}]},{"t
不容錯過的 11 項 HTML/JS/CSS 技巧。 通過以下 HTML/CSS/JavaScript 相關技巧,希望能幫助大家填補一點點關於前端開發方面的知識空白。1.Datalist元素這項 HTML 元素的使用頻率極低,今天我們就要
{"type":"doc","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null,"origin":null}},{"type":"blockq
{"type":"doc","content":[{"type":"blockquote","content":[{"type":"paragraph","attrs":{"indent":0,"number":0,"align":null
近日,微軟宣佈將於今年 12 月終止對 Adobe Flash Player 的支持,屆時,微軟旗下所有瀏覽器都將無法使用 Flash,Adobe 也不會在今年 12 月後發佈安全更新。早在 2017 年,Adobe、Apple、Face
{"type":"doc","content":[{"type":"heading","attrs":{"align":null,"level":1},"content":[{"type":"text","text":"前言"}]},{"t
canvas簡介 canvas標籤是用來繪製圖像的 canvas本身沒有繪畫的能力,僅僅是圖形的容器,相當於一塊畫板 必須要使用腳本完成繪製:JS canvas繪畫 <!DOCTYPE html> <html lang="
<!doctype html> <html> <head></head> <body> <canvas width="500" height="800" style="background:yellow" id="canvas"
<!doctype html> <html> <head></head> <body> <canvas id="clock" width="500" height="500"> 您的瀏覽器不支持canvas標籤,無法看到時鐘
<!doctype html> <html> <head></head> <body> <form action="http://localhost/test.php" method="post" id="register"></