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好的，所以这听起来可能是一个非常愚蠢的问题，但我是 Javascript 的新手。

基本上，我希望我的页面只在用户未填写的文本框旁边写下“请填写”字样。

 <!DOCTYPE html>

<head>
<title>Easy Budget</title>
<link rel="stylesheet" type="text/css" href="stylesheet.css"/>

<script>

function myFormFunction()
{
if (document.myForm.Name.value == "")
{
alert("Name must be filled in");
document.myForm.Name.focus();
return false;
}
if (document.myForm.Surname.value == "")
{
alert("Surname must be filled in");
document.myForm.Surname.focus();
return false;
}
if (document.myForm.Income.value == "")
{
alert("Income must be filled in");
document.myForm.Income.focus();
return false;
}
return (true) ;
}
</script>

</head>

<header>
</header>

<body>

<form name="myForm" onSubmit="return myFormFunction()" method="post">

 <h3>Work Out Your Budget</h3>

 <p><h4>Personal Details:</h4></p>

<p>  Name:  <input type="text" name="Name"></p>
<p>  Surname:   <input type="text" name="Surname"></p>
<p>  Income:    <input type="text" name="Income"></p>

 <p><h4>What are your monthly expenses?</h4></p>

 <p><input type="checkbox" name="Groceries">Groceries</input></p>
 <p><input type="checkbox" name="Car">Car</input></p>
 <p><input type="checkbox" name="PublicTransport">Public Transport</input></p>
 <p><input type="checkbox" name="Rent">Rent</input></p>
 <p><input type="checkbox" name="Pets">Pets</input></p>
 <p><input type="checkbox" name="Drinking">Drinking</input></p>
 <p><input type="checkbox" name="Smoking">Smoking</input></p>
 <p><input type="checkbox" name="NightsOut">Night's Out</input></p>
 <p><button type="Submit" value="Submit">Submit</Button></p>
</form>
</body>
</html>

这是整个文档，正如我所说的，它工作正常，但我不希望每次都弹出警报。我只是希望它显示在文本框“请填写”旁边

提前致谢

4

1 回答 1

0

好的，所以我现在似乎已经明白了......

这里的 JS

<script>

function myFormFunction()

{
if (document.myForm.Name.value == "")
{
var el1 = document.getElementById("name");
el1.style.display = "block";
document.myForm.Name.focus();
return false;
}
if (document.myForm.Surname.value == "")
{
var el2 = document.getElementById("surname");
el2.style.display = "block";
document.myForm.Surname.focus();
return false;
}
if (document.myForm.Income.value == "")
{
var el3 = document.getElementById("income");
el3.style.display = "block";
document.myForm.Income.focus();
return false;
}
return (true) ;
}
</script>

这里是修改后的形式

<form name="myForm" onSubmit="return myFormFunction()" method="post">

<h3>Work Out Your Budget</h3>

<p><h4>Personal Details:</h4></p>

<p> Name:   <input type="text" name="Name">
<div id="name" style="display:none">Please enter your name</div></p>
<p> Surname:    <input type="text" name="Surname">
<div id="surname" style="display:none">Please enter your surname</div></p>
<p> Income:     <input type="text" name="Income">
<div id="income" style="display:none">Please enter your income</div></p>

 <br>

 <p><h4>What are your monthly expenses?</h4></p>

 <p><input type="checkbox" name="Groceries">Groceries</input></p>
 <p><input type="checkbox" name="Car">Car</input></p>
 <p><input type="checkbox" name="PublicTransport">Public Transport</input></p>
 <p><input type="checkbox" name="Rent">Rent</input></p>
 <p><input type="checkbox" name="Pets">Pets</input></p>
 <p><input type="checkbox" name="Drinking">Drinking</input></p>
 <p><input type="checkbox" name="Smoking">Smoking</input></p>
 <p><input type="checkbox" name="NightsOut">Night's Out</input></p>

 <p><button type="Submit" value="Submit">Submit</Button></p>
</form>
于 2013-10-16T05:58:17.057 回答