?????? ??
JavaScript??? ?? ??, ?? ??, ???? ??? ? ?? ??? ??? ??? ?? ? ????.
JavaScript ??()
??: ?? ??("sometext");
JavaScript?? ?? ??? ???? ??? ?? ??? ????:
<script type="text/javascript " >
Alert("?? ???? ??????!");
</script>
??? ?? ??? ?? ?? ?????. ?? ??? ???? ???? ?? ??? ???? ???. ??? ???? ?? ?? ??? ?????.
alert ???? ????? ????? ??? ???? HTML ??? ?? ??? ????? ????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
function myFunction(){
alert("我是一個警告框！");
}
</script>
</head>
<body>
<input type="button" onclick="myFunction()" value="警告框" />
</body>
</html>JavaScript verify()
JavaScript?? ?? ??? ???? ??? ?? ??? ????.
??: ??confirm("sometext");
?? ??? ????? ???? ??? ?????.
?? ??? ???? ???? "??" ?? "??"? ???? ??? ??? ??? ? ????.
"??"? ???? ?? ??? true? ?????. "??"? ???? ?? ??? false? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
<script>
if (confirm("您確認(rèn)要刪除該條信息嗎？")){
alert("您選擇了刪除！");
} else {
alert("您選擇了不刪除");
}
</script>
</head>
<body>
</body>
</html>JavaScript ????()
??: prompt("sometext","defaultvalue");
?? ??
prompt()? ? ?? ????? ?????. ? ?? ????? ???????. ??? ???? ?? ? ?? ????? ?? ?? ?????. ?? ??? ?? ?? ??? ????()? ?? ??? ?(HTML ?? ??)? ????, ??? ??? null? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
<script>
var name = prompt("請輸入您的名字：","默認(rèn)字符")
if (name!=null && name!=""){
document.write("你好，" + name + "！")
}
</script>
</head>
<body>
</body>
</html>? ??
?? ???? ???? + "n"(n)? ???? ? ??? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<button onclick="myFunction()">點擊顯示</button>
<p id="demo"></p>
<script>
function myFunction(){
alert("Hello\nHow are you?");
}
</script>
</body>
</html>
