1、Javascript消息框
(1)Alert(警告)框
(2)帶有換行的警告框
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript的使用</title>
</head>
<body>
<p>點擊按鈕在彈窗總使用換行。</p>
<button onclick="myFunction()">點我</button>
<p id="demo"></p>
<script>
function myFunction(){
alert("Y\nHow are you?");
}
</script>
</body>
</html>
(3)確認框
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Javascript的使用</title>
</head>
<body>
<p>點擊按鈕,顯示確認框。</p>
<button onclick="myFunction()">點我</button>
<p id="demo"></p>
<script>
function myFunction(){
var x;
var r=confirm("按下按鈕!");
if (r==true){
x="你按下了\"確定\"按鈕!";
}
else{
x="你按下了\"取消\"按鈕!";
}
document.getElementById("demo").innerHTML=x;
}
</script>
</body>
</html>
(4)提示框
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript的使用</title>
</head>
<body>
<p>點擊按鈕查看輸入的對話框。</p>
<button onclick="myFunction()">點我</button>
<p id="demo"></p>
<script>
function myFunction(){
var x;
var person=prompt("請輸入你的名字","YX");
if (person!=null && person!=""){
x=person + ", 近來可好?";
document.getElementById("demo").innerHTML=x;
}
}
</script>
</body>
</html>