[英]form validation. Radio button check doesn't work and some other problems in form
<!DOCTYPE html>
<html>
<head>
<title>SignUp</title>
<link rel="stylesheet" href="style/style.css">
<style type="text/css">
#signup{
margin-left:200px;
margin-top:90px;
}
#signup input{
margin:2px 0px 20px 10px;
background-color:#EAEAEA;
}
#signup button{
font-size:16px;
margin-top:50px;
margin-left:150px;
width:100px;
height:31px;
background-color:#333333;
text-align:center;
color:#FFF;
}
</style>
<script>
function signup()
{
var x1=document.forms["signUpForm"]["username"].value;
var x2=document.forms["signUpForm"]["email"].value;
var x3=document.forms["signUpForm"]["password1"].value;
var x4=document.forms["signUpForm"]["password2"].value;
var x5=""; /* document.forms[0].radios is an array filled with all radio buttons. Loop through all of them and see if it is checked. If one is, transfer the value of that radio button to user_input.*/
var atpos=x2.indexOf("@");
var dotpos=x2.lastIndexOf(".");
if(document.getElementById('gender_Male').checked) {
x5="Male";
}else if(document.getElementById('gender_Female').checked) {
x5="Female";
}
if (x1==null || x1==""|| x2==null || x2==""|| x3==null || x3=="" || x4==null || x4=="" || x5=="")
{
alert("Please fill all the required fields");
return false;
}
else if (x3!=x4){
alert("Psswords do not match");
return false;
}
else if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x2.length)
{
alert("Not a valid e-mail address");
return false;
}
else{
return document.forms[0].action = "signupdata.php";
}
}
</script>
</head>
<body>
<?php include_once("template_pageTop.php"); ?>
<div id=signup>
<h2>Sign Up Here </h2>
<form method="post" name="signUpForm" >
<table border="0" cellpadding="2">
<tr>
<td >UserName:*</td>
<td ><input type="text" name="username" size="30" ></td>
</tr>
<tr>
<td>Email:*</td>
<td><input type="text" name="email" size="30" ></td>
</tr>
<tr>
<td>Password:*</td>
<td><input type="password" name="password1" size="30" ></td>
</tr>
<tr>
<td>Confirm Password:*</td>
<td><input type="password" name="password2" size="30" ></td>
</tr>
<tr>
<td>Gender:*</td>
<td ><input type="radio" name="gender" value="male" id="gender_Male">Male<br/>
<input type="radio" name="gender" value="female" id="gender_Female">Female</td>
</tr>
<tr>
<td><button onclick= "signup()" >SignUp</button> </td>
<td><button type="reset" >Cancel</button> </td>
</tr>
</table>
</form>
</div>
</body>
</html>
以這種形式我需要改進幾件事。
我是網頁設計的新手。請提供任何幫助。
如果單選按鈕是強制性的,則默認情況下最好復選其中一個單選按鈕。
<input type="radio" name="gender" checked value="male" >Male<br/>
<input type="radio" name="gender" value="female">Female</td>
<input type="radio" name="gender" checked value="male" id="male" >Male<br/>
<input type="radio" name="gender" value="female" id="female">Female</td>
if(document.getElementById('male').checked) {
//Male radio button is checked
}else if(document.getElementById('female').checked) {
//Female is checked
}
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