標籤：ntb doc img 部分 技術 content 分享 src set
<!DOCTYPE html><html><head lang="en"> <meta charset="UTF-8"> <title>DOM訪問HTML元素</title> <script type="text/javascript"> function showContent() { //通過document對象操作DOM樹 //document對象通過id擷取一個元素 var div = document.getElementById("my_div"); var content = document.getElementById("content"); var name = document.getElementById("name"); //拿到元素後，可以擷取裡面的內容 //如果擷取一個元素內容部分的東西：.innerHTML //擷取表單元素的value值：.value alert(div.innerHTML); alert(content.value); alert(name.value); } </script></head><body><div id="my_div">我的div塊</div><textarea id="content" rows="3" cols="25"> 好好學習，天天向上！</textarea><br/><input id="name" type="text" value="mary"/><br/><input type="button" id="btn_show" value="訪問3個元素的內容" onclick="showContent()"/></body></html>
DOM訪問HTML元素
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