用js去操作HTML元素和CSS樣式
阿新 • • 發佈：2019-01-03
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>熱身</title> </head> <body> <div id="p1">我是第一段文字</div> <p id="p2">我是第二段文字</p> <script type="text/javascript"> document.write("hellow"); document.write("你好，要堅持下去學習"); document.getElementById("p2").style.color= "red"; document.getElementById("p1").innerHTML ="aaaa"; </script> </br></br></br> 雖然每行分號";"也可以不寫，但我們要養成程式設計的好習慣，記得在語句末尾寫 </body> </html>
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>innerHTML</title> </head> <body> <h2 id="con">javascript</H2> <script type="text/javascript"> var mychar=document.getElementById("con"); document.write("原標題:"+mychar.innerHTML+"<br>"); //輸出原h2標籤內容 mychar.innerHTML ="修改後我要學習javascript"; document.write("修改後的標題:"+mychar.innerHTML); //輸出修改後h2標籤內容 </script> </body> </html>
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>style樣式</title> </head> <body> <h2 id="con">I love JavaScript</H2> <p> JavaScript使網頁顯示動態效果並實現與使用者互動功能。</p> <script type="text/javascript"> var mychar= document.getElementById("con"); mychar.style.color="red" mychar.style.backgroundColor="blue"; mychar.style.width="200px"; mychar.style.height="200px"; // mychar.style.display="none"; //隱藏con // mychar.remove(con); // 同樣可以隱藏con </script> </body> </html>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>display</title>
<script type="text/javascript">
function hidetext()
{
var mychar = document.getElementById("con").style.display ="none";
}
function showtext()
{
var mychar = document.getElementById("con").style.display ="block";
}
</script>
</head>
<body>
<h1>JavaScript</h1>
<p id="con">做為一個Web開發師來說，如果你想提供漂亮的網頁、令使用者滿意的上網體驗，JavaScript是必不可少的工具。</p>
<form>
<input type="button" onclick="hidetext()" value="隱藏內容" />
<input type="button" onclick="showtext()" value="顯示內容" />
</form>
</body>
</html><!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>className屬性</title>
<style>
body{ font-size:16px;}
.one{
border:1px solid #eee;
width:230px;
height:50px;
background:#ccc;
color:red;
}
.two{
border:1px solid #ccc;
width:230px;
height:50px;
background:#9CF;
color:blue;
}
</style>
</head>
<body>
<p id="p1" > JavaScript使網頁顯示動態效果並實現與使用者互動功能。</p>
<input type="button" value="新增樣式" onclick="add()"/>
<p id="p2" class="one">JavaScript使網頁顯示動態效果並實現與使用者互動功能。</p>
<input type="button" value="更改外觀" onclick="modify()"/>
<script type="text/javascript">
function add(){
var p1 = document.getElementById("p1");
p1.className="one";
}
function modify(){
var p2 = document.getElementById("p2");
p2.className="two";
}
</script>
</body>
</html>