📄 web9.html
字号:
<html>
<head>
<title>the web is very good</title>
<script language="JavaScript">
function a()
{
var at=document.getElementById("email").value.indexOf("@");
var age=document.getElementById("age").value;
var fname=document.getElementById("fname").value;
submitOK="true"
if(fname.length>10)
{
alert("the name must be less 10");
}
if(age<1||age>100)
{
alert("the age must be a number between 1 to 100");
submitOK="false";
}
if(at==-1)
{
alert("not a valid number");
submitOK="false";
}
if(submitOK=="false")
{
return false;
}
}
</script>
</head>
<body>
<form action="tryjs_submitpage.html" onsubmit="return a()">
name(max 10 character):<input type="text" id="fname" size="20"><br/>
age(from 1 to 100):<input type="text" id="age" size="20"><br/>
e-mail:<input type="text" id="email" size="20"><br/>
<input type="submit" value="Submit">
</form>
</body>
</html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -