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JavaScript? ????? ? ???(????) ??? ?? ???? ???? ???, ??? ??? ??? ???? ? HTML ? ???? ?? ??? ???? ? ?????.
JavaScript? ?? ??? ?? ?? ? ??? ?? ???? ??? ???? ?? ? ?????? ?????.
JavaScript? ?? Sun Corporation? ?? ?????. ?? ?? ??? Javascript? Ecma International(? European Computer Manufacturer Association)? ECMA-262 ??(ECMAScript)? ??? ?????. ?? ?? ????.
JavaScript ??
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JavaScript? ?? ???? ????? ???? ?????? ???? ???? ?????. ?? ???? ??? ????? JavaScript? ?????? ??? ? ? ?? ???? ?? ?????.
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JavaScript? ?? ?? ???? ?? ???? ??? ?? ????. ?, ??? ?? ??? ??? ? ??? ?????. ??? ???? ??? ?? ???? ????? ?? ??? ?? ?? ??? ??? ? ????.
Simplicity
JavaScript ??? ?? ?????. ?? ?? ??? ??? ??? ??? ??? ???? ??? JavaScript ????? ??? ? ????. ???? ???? ??? ?? ??? ?? ?? ??? ??? ??? ?? ??? ???? ????.
Security
JavaScript? ?? ??? ?? ?? ???? ?? ???? ???? ???, ???? ??? ?? ? ??? ?????. ????? ?? ????? ?? ???? ?? ?? ??? ???? ??? ??? ????? ??? ? ????.
Dynamics
JavaScript? ????? ? ??? ????? ??? ?? ??? ??? ?? ??? ? ????. ??? ?? ???? ????? ?????. ?? ??? ???? ? ????? ?? ??? ?????? ???? ??? ???? ?? "???"?? ???. ?? ?? ??? ???, ? ??, ?? ?? ??? ??? ? ????. ????. ???? ???? ?? JavaScript ??? ??? ??? ? ????.
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JavaScript? ? ????? ?? ???? ?? ?? ??? ??? ??? ??? ???? ????? ??? ? ?? ????? JavaScript? ???? ? ???? ??? ? ????. .
HTML ??? ?? ??
<html>
<head>
<script>
alert('Hello, world');
</script>
</head>
<body>
<p>...</p>
</body>
</html>???? ?? ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php.cn</title>
</head>
<body>
<button type="button" onclick="alert('你好!')">點(diǎn)我!</button>
</body>
</html>HTML ??? ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<p id="demo">
內(nèi)容。
</p>
<script>
function myFunction()
{
x=document.getElementById("demo"); // 找到元素
x.innerHTML="Hello JavaScript!"; // 改變內(nèi)容
}
</script>
<button type="button" onclick="myFunction()">點(diǎn)擊這里</button>
</body>
</html>HTML ??? ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<script>
function changeImage()
{
element=document.getElementById('myimage')
if (element.src.match("bulbon"))
{
element.src="/images/pic_bulboff.gif";
}
else
{
element.src="/images/pic_bulbon.gif";
}
}
</script>
<img id="myimage" onclick="changeImage()"
src="/images/pic_bulboff.gif" width="100" height="180">
<p>點(diǎn)擊燈泡查看效果</p>
</body>
</html> HTML ??? ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<p id="demo">
改變 HTML 的樣式。
</p>
<script>
function myFunction()
{
x=document.getElementById("demo") // 找到元素
x.style.color="blue"; // 改變樣式
}
</script>
<button type="button" onclick="myFunction()">點(diǎn)擊這里</button>
</body>
</html>?? ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
<script type="text/javascript">
function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2)
{alert(alerttxt);return false}
else {return true}
}
}
function validate_form(thisform)
{
with (thisform)
{
if (validate_email(email,"Not a valid e-mail address!")==false)
{email.focus();return false}
}
}
</script>
</head>
<body>
<form action="submitpage.htm"onsubmit="return validate_form(this);" method="post">
Email: <input type="text" name="email" size="30">
<input type="submit" value="Submit">
</form>
</body>
</html>
