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我在嘗試使用Javascript驗證整個表單時遇到了問題。使用Javascript驗證表單
「添加JavaScript代碼以產生錯誤消息，並且如果任何數量字段包含非數字數據，則會禁止提交表單（數量爲空即可，但如果數量不爲空，則必須只有）將一個action = attribute添加到您的標籤中，以將該表單提交給網站（不打算放入實際的網站）。測試當數量爲數字或空白時正確提交表單，否則產生錯誤消息「。
我已經完成了所有的指示要求我做，它不工作。我們應該使用我們在之前的實驗室中創建的表單。這是我一直在努力的代碼。
<!DOCTYPE html>
<html>
<head>
<title>Lab 6, Part 3</title>
<meta charset="UTF-8"/>
<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
<script type="text/javascript">
function validateForm(){
var a = document.forms["myform"]["Pokemon"].value;
var b = document.forms["myform"]["Pokeball"].value;
var c = document.forms["myform"]["Pikachu"].value;
var d = document.forms["myform"]["firstname"].value;
var e = document.forms["myform"]["lastname"].value;
var f = document.forms["myform"]["streetaddress"].value;
var g = document.forms["myform"]["city"].value;
var h = document.forms["myform"]["zipcode"].value;
if (a = null || a == ""){
alert("Grapes must be filled out!");
return false;
}
if (b = null || b == ""){
alert("Cherries must be filled out!");
return false;
}
if (c = null || c == ""){
alert("Strawberries must be filled out!");
return false;
}
if (d = null || d == ""){
alert("First Name must be filled out!");
return false;
}
if (e = null || e == ""){
alert("Last Name must be filled out!");
return false;
}
if (f = null || f == ""){
alert("Street Address must be filled out!");
return false;
}
if (g = null || g == ""){
alert("City must be filled out!");
return false;
}
if (h = null || h == ""){
alert("Zip Code must be filled out!");
return false;
}
}
</script>
</head>
<body><form>
<form name="myform" action="http://weblab.kennesaw.edu/formtest.php"
onsubmit="return validateForm()"
method = "post">
<h1 style="text-align:center">Lab 6, Part 3</h1>
<h2 style="text-align:center">IT 3203</h2>
<a href="index.html"><p style="text-align:center">Main Page!</p></a>
<p>Grapes</p><input type=text size=3 maxlength=3 name="Pokemon">
<p>Cherries</p><input type=text size=3 maxlength=3 name="Pokeball">
<p>Strawberries</p><input type=text size=3 maxlength=3 name="Pikachu">
<br>
<label>First Name
<input type="text"
name="firstname" id="firstname"
size="25" />
</label>
<br>
<br>
<label>Last Name
<input type="text"
name="lastname" id="lastname"
size="25" />
</label>
<br>
<br>
<label>Street Address
<input type="text"
name="streetaddress" id="streetaddress"
size="35" />
</label>
<br>
<br>
<label>City
<input type="text"
name="city" id="city"
size="25" />
</label>
<label>State:
<select name="state">
<option>Please Select</option>
<option>Alabama</option>
<option>Alaska</option>
<option>Arizona</option>
<option>Arkansas</option>
<option>California</option>
<option>Colorado</option>
<option>Connecticut</option>
<option>Delaware</option>
<option>Florida</option>
<option>Georgia</option>
<option>Hawaii</option>
<option>Idaho</option>
<option>Illinois</option>
<option>Indiana</option>
<option>Iowa</option>
<option>Kansas</option>
<option>Kentucky</option>
<option>Louisiana</option>
<option>Maine</option>
<option>Maryland</option>
<option>Massachusetts</option>
<option>Michigan</option>
<option>Minnesota</option>
<option>Mississippi</option>
<option>Missouri</option>
<option>Montana</option>
<option>Nebraska</option>
<option>Nevada</option>
<option>New Hampshire</option>
<option>New Jersey</option>
<option>New Mexico</option>
<option>New York</option>
<option>North Carolina</option>
<option>North Dakota</option>
<option>Ohio</option>
<option>Oklahoma</option>
<option>Oregon</option>
<option>Pennsylvania</option>
<option>Rhode Island</option>
<option>South Carolina</option>
<option>South Dakota</option>
<option>Tennessee</option>
<option>Texas</option>
<option>Utah</option>
<option>Vermont</option>
<option>Virginia</option>
<option>Washington</option>
<option>West Virginia</option>
<option>Wisconsin</option>
<option>Wyoming</option>
</select>
</label>
<br>
<br>
<label>Zip code:
<input type="text"
name="zipcode" id="zipcode"
size="20" />
</label>
</form>
<br>
<br>
<label>Visa
<input type="radio" name="pref_payment"
id="pref_payment_visa" value="visa" checked />
</label><br />
<label>MasterCard
<input type="radio" name="pref_payment"
id="pref_payment_master" value="master" checked />
</label><br />
<label>American Express
<input type="radio" name="pref_payment"
id="pref_payment_american" value="american" checked />
</label><br />
<input type="button" onclick="confirmation()" value="submit">
</form>
</body>
</html>
這可能是一些小事，我忽略了一些東西。哦，我們必須將這些文件保存在.php文件中，所以這可能與它有很大關係。
什麼並不完全工作？表單不提交？你在開發控制檯中看到任何錯誤嗎？ – Terminus
爲什麼你的選項沒有「價值」？ – Terminus
否表單不提交。你認爲有價值的期權是什麼意思？ –