<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title>form</title>
<script type="text/javascript">
function f(){
//方法一：
var firstName = document.getElementById("first").value;
var lastName = document.getElementById("last").value;
console.log(firstName + " " + lastName);
//方法二：
var firstName2 = document.login.firstName.value;
var lastName2 = document.login.lastName.value;
console.log(firstName2 + " " + lastName2);
//方法三
var firstName3 = document.forms[0].firstName.value;
var lastName3 = document.forms[0].lastName.value;
console.log(firstName3 + " " + lastName3);
//方法四：
var firstName4 = document.forms["myform"].firstName.value;
var lastName4 = document.forms["myform"].lastName.value;
console.log(firstName4 + " " + lastName4);
//方法五：
var firstName5 = login.firstName.value;
var lastName5 = login.lastName.value;
console.log(firstName5 + " " + lastName5);
}
</script>
</head>
<body>
<form action="#" name="login" id="myform">
first name: <input type="text" name="firstName" id="first" /><br/>
last name: <input type="text" name="lastName" id="last" /><br/>
<input type="button" value="確定" onclick="f()" /><br/>
</form>
</body>
</html>
