我需要帮助 在javascript警告框中显示 我的用户输入来自文本框，单选按钮，复选框和下拉列表，然后按下提交按钮显示它。我目前不知道该怎么做。正如你所看到的，我已经尝试建立一个功能，但很明显我不知道如何处理它。感谢所有帮助，
感谢。
就是这样：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial- scale=1.0">
<title>Questions n Shiz</title>
<link rel="stylesheet" href="css/normanlize-signup.css">
<link href='http://fonts.googleapis.com/css?family=Nunito:400,300' rel='stylesheet' type='text/css'>
<link rel="stylesheet" href="css/signup.css">
<link rel="icon" href="favicon.ico">
<script>
function displayOutput() {
var input1 = document.getElementById("name").value;
var input2 = document.getElementById("mail").value;
var input3 = document.getElementById("password").value;
var input4 = document.getElementById("name").value;
if (input.length === 0) {
alert("Please enter a valid input");
return;
}
document.getElementById("result").innerHTML = "You have entered " + input1;
alert(?)
}
</script>
</head>
<body>
<form>
<h1>Enter Thou'st Information</h1>
<fieldset>
<legend><span class="number">1</span> Your basic info</legend>
<label for="name">Name:</label>
<input type="text" id="name" name="user_name" placeholder="Rob Neale">
<label for="mail">Email:</label>
<input type="email" id="mail" name="email" placeholder="robneale@gmail.com">
<label for="password">Password:</label>
<input type="password" id="password" name="password" placeholder="robrastamanneale">
<label>Gender/Sex:</label>
<input type="radio" id="male" value="male" name="user_gender"><label for="under_16" class="light">Male</label>
<br>
<input type="radio" id="female" value="female" name="user_gender"><label for="over_16" class="light">Female</label>
</fieldset>
<fieldset>
<legend><span class="number">2</span> Your profile</legend>
<label for="bio">Biography:</label>
<textarea id="bio" name="user_bio" placeholder="Some words go in here ;)"></textarea>
<label for="house">House:</label>
<select id="house" name="user_job">
<optgroup label="House">
<option value="bradman">Bradman</option>
<option value="chisholm">Chisholm</option>
<option value="helpmann">Helpmann</option>
<option value="mawson">Mawson</option>
<option value="mccubbin">McCubbin</option>
<option value="oliphant">Oliphant</option>
<option value="sutherland">Sutherland</option>
<option value="thiele">Thiele</option>
</optgroup>
</optgroup>
</select>
<label>Subjects</label>
<input type="checkbox" id="development" value="interest_maths" name="user_interest">
<label class="light" for="development">Maths C</label>
<br>
<input type="checkbox" id="design" value="interest_physics" name="user_interest">
<label class="light" for="design">Physics</label>
<br>
<input type="checkbox" id="business" value="interest_chemistry" name="user_interest">
<label class="light" for="business">Chemistry</label>
<br>
<input type="checkbox" id="business" value="interest_biology" name="user_interest">
<label class="light" for="business">Biology</label>
<br>
<input type="checkbox" id="business" value="interest_marine" name="user_interest">
<label class="light" for="business">Marine Biology</label>
<br>
<input type="checkbox" id="business" value="interest_graphics" name="user_interest">
<label class="light" for="business">Graphics</label>
<br>
<input type="checkbox" id="business" value="interest_ipt" name="user_interest">
<label class="light" for="business">IPT</label>
<br>
<input type="checkbox" id="business" value="interest_its" name="user_interest">
<label class="light" for="business">ITS</label>
<br>
<input type="checkbox" id="business" value="interest_business" name="user_interest">
<label class="light" for="business">Business</label>
<br>
<input type="checkbox" id="business" value="interest_legal" name="user_interest">
<label class="light" for="business">Legal Studies</label>
<br>
<input type="checkbox" id="business" value="interest_engineering" name="user_interest">
<label class="light" for="business">Engineering</label>
<br>
<input type="checkbox" id="business" value="interest_accoutngin" name="user_interest">
<label class="light" for="business">Accounting</label>
</fieldset>
<legend><span class="number">3</span> Submit!</legend>
<input type="checkbox" id="update" value="interest_update" name="user_update">
<label class="light" for="update">Tick to recieve a free complimentary Elliot</label>
<button type="submit" onclick="displayOutput()">Submit!</button>
</form>
</body>
答案 0 :(得分：0)
如果要在Alert中显示表单数据，只需将输入放在js中的Alert中。
OBS：警报不适用于jsFiddle
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial- scale=1.0">
<title>Questions n Shiz</title>
<link rel="stylesheet" href="css/normanlize-signup.css">
<link href='http://fonts.googleapis.com/css?family=Nunito:400,300' rel='stylesheet' type='text/css'>
<link rel="stylesheet" href="css/signup.css">
<link rel="icon" href="favicon.ico">
</head>
<body>
<form>
<h1>Enter Thou'st Information</h1>
<fieldset>
<legend><span class="number">1</span> Your basic info</legend>
<label for="name">Name:</label>
<input type="text" id="name" name="user_name" placeholder="Rob Neale">
<label for="mail">Email:</label>
<input type="email" id="mail" name="email" placeholder="robneale@gmail.com">
<label for="password">Password:</label>
<input type="password" id="password" name="password" placeholder="robrastamanneale">
<label>Gender/Sex:</label>
<input type="radio" id="male" value="male" name="user_gender"><label for="under_16" class="light">Male</label>
<br>
<input type="radio" id="female" value="female" name="user_gender"><label for="over_16" class="light">Female</label>
</fieldset>
<fieldset>
<legend><span class="number">2</span> Your profile</legend>
<label for="bio">Biography:</label>
<textarea id="bio" name="user_bio" placeholder="Some words go in here ;)"></textarea>
<label for="house">House:</label>
<select id="house" name="user_job">
<optgroup label="House">
<option value="bradman">Bradman</option>
<option value="chisholm">Chisholm</option>
<option value="helpmann">Helpmann</option>
<option value="mawson">Mawson</option>
<option value="mccubbin">McCubbin</option>
<option value="oliphant">Oliphant</option>
<option value="sutherland">Sutherland</option>
<option value="thiele">Thiele</option>
</optgroup>
</optgroup>
</select>
<label>Subjects</label>
<input type="checkbox" id="development" value="interest_maths" name="user_interest">
<label class="light" for="development">Maths C</label>
<br>
<input type="checkbox" id="design" value="interest_physics" name="user_interest">
<label class="light" for="design">Physics</label>
<br>
<input type="checkbox" id="business" value="interest_chemistry" name="user_interest">
<label class="light" for="business">Chemistry</label>
<br>
<input type="checkbox" id="business" value="interest_biology" name="user_interest">
<label class="light" for="business">Biology</label>
<br>
<input type="checkbox" id="business" value="interest_marine" name="user_interest">
<label class="light" for="business">Marine Biology</label>
<br>
<input type="checkbox" id="business" value="interest_graphics" name="user_interest">
<label class="light" for="business">Graphics</label>
<br>
<input type="checkbox" id="business" value="interest_ipt" name="user_interest">
<label class="light" for="business">IPT</label>
<br>
<input type="checkbox" id="business" value="interest_its" name="user_interest">
<label class="light" for="business">ITS</label>
<br>
<input type="checkbox" id="business" value="interest_business" name="user_interest">
<label class="light" for="business">Business</label>
<br>
<input type="checkbox" id="business" value="interest_legal" name="user_interest">
<label class="light" for="business">Legal Studies</label>
<br>
<input type="checkbox" id="business" value="interest_engineering" name="user_interest">
<label class="light" for="business">Engineering</label>
<br>
<input type="checkbox" id="business" value="interest_accoutngin" name="user_interest">
<label class="light" for="business">Accounting</label>
</fieldset>
<legend><span class="number">3</span> Submit!</legend>
<input type="checkbox" id="update" value="interest_update" name="user_update">
<label class="light" for="update">Tick to recieve a free complimentary Elliot</label>
<button type="button" onclick="displayOutput()">Submit!</button>
</form>
<script>
function displayOutput() {
var input1 = document.getElementById("name").value;
var input2 = document.getElementById("mail").value;
var input3 = document.getElementById("password").value;
var input4 = document.getElementById("name").value;
if (input1.length === 0) {
alert("Please enter a valid input");
return;
}
document.getElementById("result").innerHTML = "You have entered " + input1;
alert(input1 + ' -' + input2);
}
</script>
</body>
答案 1 :(得分：0)
使用jQuery：
$('#formid').submit(function (e) {
e.preventDefault();
var formData = $('#formid').serialize();
alert(JSON.stringify(formData));
});
http://jsfiddle.net/7coquo4n/2/
没有：
document.getElementById('formid').onsubmit = function (e) {
e.preventDefault();
alert(serialize(document.getElementById('formid')));
}
function serialize(form) {
if (!form || form.nodeName !== "FORM") {
return;
}
var i, j, q = [];
for (i = form.elements.length - 1; i >= 0; i = i - 1) {
if (form.elements[i].name === "") {
continue;
}
switch (form.elements[i].nodeName) {
case 'INPUT':
switch (form.elements[i].type) {
case 'text':
case 'hidden':
case 'password':
case 'button':
case 'reset':
case 'submit':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'checkbox':
case 'radio':
if (form.elements[i].checked) {
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
}
break;
}
break;
case 'file':
break;
case 'TEXTAREA':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'SELECT':
switch (form.elements[i].type) {
case 'select-one':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'select-multiple':
for (j = form.elements[i].options.length - 1; j >= 0; j = j - 1) {
if (form.elements[i].options[j].selected) {
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].options[j].value));
}
}
break;
}
break;
case 'BUTTON':
switch (form.elements[i].type) {
case 'reset':
case 'submit':
case 'button':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
}
break;
}
}
return q.join("&");
}