{
var x=document.forms.myForm
x[0].checked=false
}
</script>
</head>
<body>
<form name="myForm">
<input type="checkbox" value="on">
<input type="button" onclick="check()" value="Check Checkbox">
<input type="button" onclick="uncheck()" value="Uncheck Checkbox">
</form>
</body>
</html>
表单中的副选框的选择与取消
<html>
<head>
<script type="text/javascript">
function check()
{
coffee=document.forms[0].coffee
answer=document.forms[0].answer
txt=""
for (i=0;i<coffee.length;++ i)
{
if (coffee[i].checked)
{
txt=txt + coffee[i].value + " "
}
}
answer.value="You ordered a coffee with " + txt
}
</script>
</head>
<body>
<form>
How would you like your coffee?<br /><br />
<input type="checkbox" name="coffee" value="cream">With cream<br />
<input type="checkbox" name="coffee" value="sugar">With sugar<br />
<br />
<input type="button" name="test" onclick="check()" value="Send order">
<br /><br />
<input type="text" name="answer" size="50">
</form>
</body>
</html>
副选框实现的功能(转换为大写)
<html>
<body>
<script type="text/javascript">
function convertField(field)
{
if (document.form1.convertUpper.checked)
{
field.value=field.value.toUpperCase()
}
}
function convertAllFields()
{
document.form1.fname.value=document.form1.fname.value.toUpperCase()
document.form1.lname.value=document.form1.lname.value.toUpperCase()
}
</script>
<form name="form1">
First name:
<input type="text" name="fname" onChange="convertField(this)" size="20" />
<br />
Last name:
<input type="text" name="lname" onChange="convertField(this)" size="20" />
<br />
Convert fields to upper case
<input type="checkBox" name="convertUpper" onClick="if (this.checked) {convertAllFields()}" value="ON">
</form>
</body>
</html>
文档对象
显示连接的数量
<html>
<body>
<a name="A">First anchor</a><br />
<a name="B">Second anchor</a><br />
<a name="C">Third anchor</a><br />
<br />
Number of anchors in this document:
<script type="text/javascript">
document.write(document.anchors.length)
</script>
</body>
</html>
显示当前所在服务器的地址
<html>
<body>
The domain name for this site is:
<script type="text/javascript">
document.write(document.domain)
</script>
</body>
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