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<fieldset>
You can group related form 
controls together inside the 
<fieldset>
element. This is 
particularly helpful for longer 
forms.
Most browsers will show the 
fieldset
with a line around 
the edge to show how they are 
related. The appearance of these 
lines can be adjusted using CSS.
<legend>
The 
<legend>
element can 
come directly after the opening 
<fieldset>
tag and contains a 
caption which helps identify the 
purpose of that group of form 
controls.
<fieldset>
<legend>Contact details</legend>
<label>Email:<br />
<input type="text" name="email" /></label><br />
<label>Mobile:<br />
<input type="text" name="mobile" /></label><br />
<label>Telephone:<br />
<input type="text" name="telephone" /></label>
</fieldset>
chapter-07/grouping-form-elements.html
HtMl
GroupInG Form 
ElEmEnts
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165 FORMS
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You have probably seen forms 
on the web that give users 
messages if the form control has 
not been filled in correctly; this is 
known as form validation.
Traditionally, form validation 
has been performed using 
JavaScript (which is beyond the 
scope of this book). But HTML5 
is introducing validation and 
leaving the work to the browser.
Validation helps ensure the 
user enters information in a 
form that the server will be able 
to understand when the form 
is submitted. Validating the 
contents of the form before it is 
sent to the server the helps: 
Reduce the amount of work 
the server has to do
Enables users to see if there 
are problems with the form 
faster than if validation were 
performed on the server.
<form action="http://www.example.com/login/"
method="post"> 
<label for="username">Username:</label>
<input type="text" name="username"
required="required" /></title><br /> 
<label for="password">Password:</label>
<input type="password" name="password"
required="required" /> 
<input type="submit" value="Submit" />
</form>
chapter-07/html5-form-validation.html
HtMl
html5: Form VAlIDAtIon
At the time of writing, only 
Chrome and Opera supported 
HTML5 validation, although other 
browsers are expected to follow. 
In order to support older browsers 
(that do not understand HTML5), 
web page authors are likely to 
continue using JavaScript to 
validate forms.
An example of HTML5 form 
validation is the 
required
attribute, which can be used on 
any form element that the user 
is expected to fill in. This HTML5 
attribute does not need a value, 
but in HTML 4 all attributes must 
have a value. So, some people give 
this attribute a value of 
required
.
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ArtIClE
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FORMS
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<input>
Many forms need to gather 
information such as dates, email 
addresses, and URLs. This has 
traditionally been done using 
text inputs.
HTML5 introduces new form 
controls to standardize the 
way that some information is 
gathered. Older browsers that 
do not recognize these inputs 
will just treat them as a single 
line text box. 
type="date"
If you are asking the user for a 
date, you can use an 
<input>
element and give the 
type
attribute a value of 
date
This will create a date input in 
browsers that support the new 
HMTL5 input types. 
This example shows what the 
date input looks like in the Opera 
browser. The appearance of 
the date input changes across 
different browsers.
<form action="http://www.example.com/bookings/" 
method="post">
<label for="username">Departure date:</label>
<input type="date" name="depart" />
<input type="submit" value="Submit" />
</form>
chapter-07/html5-date-input.html
HtMl
html5: DAtE Input
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<input>
HTML5 has also introduced 
inputs that allow visitors to 
enter email addresses and URLs. 
Browsers that do not support 
these input types will just treat 
them as text boxes.
type="email"
If you ask a user for an email 
address, you can use the email 
input. Browsers that support 
HTML5 validation will check 
that the user has provided 
information in the correct format 
of an email address. Some smart 
phones also optimize their 
keyboard to display the keys you 
are most likely to need when 
entering an email address (such 
as the @ symbol).
type="url"
A URL input can be used when 
you are asking a user for a web 
page address. Browsers that 
support HTML5 validation will 
check that the user has provided 
information in the format of 
a URL. Some smart phones 
also optimize their keyboard to 
display the keys you are most 
likely to need when entering a 
URL.
<form action="http://www.example.org/profile.php"> 
<p>Please enter your website address:</p>
<input type="url" name="website" />
<input type="submit" value="Submit" />
</form>
chapter-07/html5-url-input.html
HtMl
Result
<form action="http://www.example.org/subscribe.php"> 
<p>Please enter your email address:</p>
<input type="email" name="email" />
<input type="submit" value="Submit" />
</form>
chapter-07/html5-email-input.html
HtMl
Result
html5: EmAIl & url Input
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<input>
If you want to create a single 
line text box for search queries, 
HTML5 provides a special type 
of input for that purpose.
type="search"
If you want to create a single 
line text box for search queries, 
HTML5 provides a special 
search input.
To create the HTML5 search box 
the 
<input>
element should 
have a 
type
attribute whose 
value is 
search
. Older browsers 
will simply treat it like a single 
line text box.
Recent browsers add some 
features that improve usability. 
For example, Safari on a Mac 
adds a cross to clear the search 
box when you have started to 
enter information. Safari also 
automatically rounds the corners 
on the search input field.
placeholder
On any text input, you can 
also use an attribute called 
placeholder
whose value is 
text that will be shown in the 
text box until the user clicks in 
that area. Older browsers simply 
ignore this attribute.
<form action="http://www.example.org/search.php">
<p>Search:</p>
<input type="search" name="search" 
placeholder="Enter keyword" />
<input type="submit" value="Search" />
</form>
chapter-07/html5-placeholder.html
HtMl
Result
<form action="http://www.example.org/search.php">
<p>Search:</p>
<input type="search" name="search" />
<input type="submit" value="Search" />
</form>
chapter-07/html5-search-input.html
HtMl
Result
html5: sEArCh Input
C# PDF File Permission Library: add, remove, update PDF file
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Data. Data: Auto Fill-in Field Data. Field: Insert Choose to offer PDF annotation and content extraction Enable or disable copying and form filling functions.
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C# PDF File Merge Library: Merge, append PDF files in C#.net, ASP.
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EXAmplE
Forms
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FORMS
This example shows a feedback and newsletter 
sign-up form. It uses a variety of form controls.
The 
<form>
element uses the 
action
attribute to indicate the page that 
the data is being sent to. Each of the form controls sits inside the 
<form>
element. Different types of form control are suited to collecting different 
types of data. The 
<fieldset>
element is used to group related 
questions together. The 
<label>
element indicates the purpose of each 
form control.
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EXAmplE
Forms
<html>
<head>
<title>Forms</title>
</head>
<body>
<form action="http://www.example.com/review.php" method="get">
<fieldset>
<legend>
Your Details:
</legend>
<label>
Name:
<input type="text" name="name" size="30" maxlength="100">
</label>
<br />
<label>
Email:
<input type="email" name="email" size="30" maxlength="100">
</label>
<br />
</fieldset>
<br />
<fieldset>
<legend>
Your Review:
</legend>
<p>
<label for="hear-about">
How did you hear about us?
</label>
<select name="referrer" id="hear-about">
<option value="google">Google</option>
<option value="friend">Friend</option>
<option value="advert">Advert</option>
<option value="other">Other</option>
</select>
</p>
<p>
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FORMS
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Forms
Would you visit again?
<br />
<label>
<input type="radio" name="rating" value="yes" />
Yes
</label>
<label>
<input type="radio" name="rating" value="no" />
No
</label>
<label>
<input type="radio" name="rating" value="maybe" />
Maybe
</label>
</p>
<p>
<label for="comments">
Comments:
</label>
<br />
<textarea rows="4" cols="40" id="comments">
</textarea>
</p>
<label>
<input type="checkbox" name="subscribe" checked="checked" /> 
Sign me up for email updates
</label>
<br />
<input type="submit" value="Submit review" />
</fieldset>
</form>
</body>
</html>
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