菜鸟学习javascript实例教程

2008-02-23 07:41:41来源:互联网 阅读 ()

新老客户大回馈,云服务器低至5折

用JS显示文字的例子:

<html>
<body>

<script type="text/javascript">
document.write("Hello World!")
</script>

</body>
</html>

用HTML标签来格式化文本的例子:

<html>
<body>

<script type="text/javascript">
document.write("<h1>Hello World!</h1>")
</script>

</body>
</html>

书写JS位置的例子:

打开页面弹出窗口的例子

<html>
<head>
<script type="text/javascript">
function message()
{
alert("网页教学网欢迎你的光临")
}
</script>
</head>

<body onload="message()">

</body>
</html>


在BODY区内输出显示文本的例子:

<html>
<head>
</head>

<body>

<script type="text/javascript">
document.write("欢迎光临网页教学网http://www.webjx.com")
</script>

</body>
</html>


调用其它的一个JS文件的例子:

<html>
<head>
</head>
<body>

<script src="xxx.js">
</script>

<p>
The actual script is in an external script file called "xxx.js".
</p>

</body>
</html>


变量的使用


变量使用的例子:


<html>
<body>

<script type="text/javascript">
var name = "Hege"
document.write(name)
document.write("<h1>" name "</h1>")
</script>

<p>This example declares a variable, assigns a value to it, and then displays the variable.</p>

<p>Then the variable is displayed one more time, only this time as a heading.</p>

</body>
</html>


函数的例子

函数使用的一个例子:

<html>
<head>

<script type="text/javascript">
function myfunction()
{
alert("HELLO")
}
</script>

</head>
<body>

<form>
<input type="button"
onclick="myfunction()"
value="Call function">
</form>

<p>By pressing the button, a function will be called. The function will alert a message.</p>

</body>
</html>

带一个参数的函数的例子:

<html>
<head>

<script type="text/javascript">
function myfunction(txt)
{
alert(txt)
}
</script>

</head>
<body>

<form>
<input type="button"
onclick="myfunction('Hello')"
value="Call function">
</form>

<p>By pressing the button, a function with an argument will be called. The function will alert
this argument.</p>

</body>
</html>

不同的两个参数调用函数的例子:

<html>
<head>
<script type="text/javascript">
function myfunction(txt)
{
alert(txt)
}
</script>
</head>

<body>
<form>
<input type="button"
onclick="myfunction('Good Morning!')"
value="In the Morning">

<input type="button"
onclick="myfunction('Good Evening!')"
value="In the Evening">
</form>

<p>
When you click on one of the buttons, a function will be called. The function will alert
the argument that is passed to it.
</p>

</body>
</html>

利用函数返回值的例子:

<html>
<head>

<script type="text/javascript">
function myFunction()
{
return ("Hello, have a nice day!")
}
</script>

</head>
<body>

<script type="text/javascript">
document.write(myFunction())
</script>

<p>The script in the body section calls a function.</p>

<p>The function returns a text.</p>

</body>
</html>


带参数的函数返回值的例子:


<html>
<head>

<script type="text/javascript">
function total(numberA,numberB)
{
return numberA numberB
}
</script>

</head>
<body>

<script type="text/javascript">
document.write(total(2,3))
</script>

<p>The script in the body section calls a function with two arguments, 2 and 3.</p>

<p>The function returns the sum of these two arguments.</p>

</body>
</html>


条件语句的例子


简单条件语句的例子:

<html>
<body>

<script type="text/javascript">
var d = new Date()
var time = d.getHours()

if (time < 10)
{
document.write("<b>Good morning</b>")
}
</script>

<p>
This example demonstrates the If statement.
</p>

标签:

版权申明:本站文章部分自网络,如有侵权,请联系:west999com@outlook.com
特别注意:本站所有转载文章言论不代表本站观点,本站所提供的摄影照片,插画,设计作品,如需使用,请与原作者联系,版权归原作者所有

上一篇:网页制作中表单相关特效整理

下一篇:使用Javascript创建XML文件