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HTML Course Tutorial - Part 2

This is second part of HTML Digital Note Book on this blog .  I hope that it's useful to readers .... you can leave your queries, suggestion to me as a comment and you can save this  notebook on your computer..... if it is useful for you - Thanks. 
  HTML is easy to learn - You will enjoy with it. 

 HTML - Web Forms
HTML web forms are a composition of buttons, checkboxes, and text input fields embedded inside of HTML documents with one goal in mind: to capture user input. By doing things such as providing fields for user data such as names, phone number, and email addresses, web forms give users the opportunity to interact directly with a webpage.
HTML forms are placed on a web page using the <form> tag. This tag should encapsulate a series of other form elements, identifying them as a single cohesive web form.

HTML Form Element:

<form name="myWebForm" action="myServerSideScript.php" method="post">
<input type="checkbox" /> Checkbox 1<br />
<input type="text" /> Text Field 1<br />
<input type="submit" value="SUBMIT" />

HTML - Input Element(s)

HTML input elements are form elements such as text fields, checkboxes, and buttons. The name comes from the <input> tag, which is the mark-up that identifies web form components. The <input> tag relies upon a few attributes to classify and name each form item, providing the web developer with a means to manipulate each element individually.
The type attribute determines what kind of input element to render to the screen. Options here include: text, checkbox, radio, button, submit, reset, password, and hidden form elements. Each has its own unique functionality and customizable presentation.

HTML Input Element Code:

      Name: <input type="text" name=”yumesh” value="enter your Name" maxlength=”25” size=”20”>

HTML - Password Fields

HTML password fields are designed to capture user input, but disguise each character with an asterisk (*) instead of displaying the entered digits. They offer a user on-screen privacy while he or she is entering a password.
Password fields are placed on a website using the <input> tag and specify a value of "password" for the type attribute.

HTML Password Field Code:

Password: <input type="password" name=”yumesh” maxlength=”25” size=”20”>

HTML - Reset Buttons

A reset button allows users to basically clear their web form. It wipes values from all fields by "resetting" the form to its default appearance.
Set the type attribute of the <input> tag to "reset" to incorporate a reset button into a web form.

HTML Reset Button Code:

<input type="reset" value="Cancel">



HTML - Submit Buttons

Submit buttons send form data to a back-end process or application. The back-end process then verifies and precesses the data, eventually passing the information into some database application.
Set the type attribute of the <input> tag to "submit" in order to place a submit button on a web page.

HTML Submit Buttons:

<input type="submit" value="ok" />
<br /><input type="submit" value="Send" />


HTML Code:

<form method="post" action="">
<input type="submit" value="Send Email" />


HTML - Checkbox Forms

Setting the type attribute of an <input> tag to checkbox places a checkbox element onto the web page.
Deploy checkbox elements in a situation when the user must check all boxes that apply (or none). A scripting language such as PHP will easily handle this form element, returning all elements the user has checked.

HTML Checkbox Code:

Soccer: <input type="checkbox" name="sports" value="soccer"  /><br />

Football: <input type="checkbox" name="sports" value="football"  /><br />

Baseball: <input type="checkbox" name="sports" value="baseball"  /><br />

Basketball: <input type="checkbox" name="sports" value="basketball"  />



HTML Checkboxes Selected

A checkbox element can be placed onto a web page in a pre-checked fashion by setting the checked attribute with a "yes" value. By doing so, this element will now default to a checked status each time the HTML page is loaded.

HTML Checkbox Selected Code:

<p>Please select every sport that you play.</p> 
Soccer: <input type="checkbox" name="sports" value="soccer" /><br />
Football: <input type="checkbox" name="sports" value="football" /><br /> 
Baseball: <input type="checkbox" name="sports" value="baseball" /><br />
Basketball: <input type="checkbox" checked="yes" name="sports" value="basketball" />


HTML - Radio Forms

Radio form elements resemble the "Scan-Tron" sheets you may have used when you were in school to take a test. They basically allow the user to "bubble" in their choice and limit each question to only one selection per radio group.
Place a radio element on to your web page by setting the type attribute of the <input> tag to "radio".

HTML Radio Input Code:

<h4>Please select your favorite food category.</h4>
<input type="radio" name="food" /> : Italian<br />
<input type="radio" name="food" /> : Greek<br />
<input type="radio" name="food" /> : Chinese<br />

HTML Multiple Radios:

<form name="myWebForm" action="" method="post">
<h4>Please select your favorite food category.</h4>
<input type="radio" name="food" /> : Italian<br />
<input type="radio" name="food" /> : Greek<br />
<input type="radio" name="food" /> : Chinese<br />
<h4>Please select your gender.</h4>
<input type="radio" name="gender" /> : Male<br />
<input type="radio" name="gender" /> : Female<br />

HTML - Select Fields

Incorporating a select field into a web page is done using the <select> tag. List values are then added to the field using the <option> tag, similar to how list items <li> are added to ordered list elements (<ol>).

HTML Drop Down List:

<select name="selectionField">
<option value="CA" >California -- CA </option>
<option value="CO" >Colorado -- CO</option>
<option value="CN" >Connecticut -- CN</option>


HTML - Upload Forms

Upload fields provide the interface that allows users to select a local file and upload it to the web server. An upload field renders as two parts -- an empty text field and a Browse button that opens up a local window explorer on the user's computer. This allows them to quickly browse to the local file and automatically fills in the file path inside of the text field.
Setting the type attribute of the <input> to "file" places the upload element on a web page.

HTML Upload Field Code:

<input type="hidden" name="MAX_FILE_SIZE" value="500" />
<input type="file" name="uploadField" />


HTML - Textareas

An HTML textarea is an oversized Text Field capable of capturing "blurb" type information from a user. If you've ever posted on a forum or left feedback on your favorite blog, you probably do so using an HTML textarea.
Embed textareas in HTML documents using the <textarea> tag. Any text placed between the opening and closing textarea tags will be rendered inside the textarea element as the "default" text. This makes for a great way to give users an example or description of how to go about filling out the text area field. Something like, "Please limit your response to 100 characters," would be an ideal description.

HTML Textarea Code:

<textarea  name="myTextArea" cols="45" rows="5">Please limit your response to 500 characters.</textarea><br />
As you may have noticed, the attributes cols (columns) and rows control the rendered size of the textarea. These constraints only impact how the textarea is rendered visually, and in no way do they limit the maximum number of characters a user can place inside the textarea. In fact, if you fill up the fields above with text, the fields will just continue to grow as you type and you will be able to scroll up and down as you please. Limits must be set with JavaScript and/or a server-side scripting language such as PHP.

HTML Frames

Frames divide a browser window into several pieces or panes, each pane containing a separate XHTML/HTML document. One of the key advantages that frames offer is that you can then load and reload single panes without having to reload the entire contents of the browser window. A collection of frames in the browser window is known as a frameset.
The window is divided up into frames in a similar pattern to the way tables are organized: into rows and columns. The simplest of framesets might just divide the screen into two rows, while a complex frameset could use several rows and columns.
There are few drawbacks also you should be aware of with frames are as follows:
·         Some browsers do not print well from framesets.
·         Some smaller devices cannot cope with frames, often because their screen is not big enough to be divided up.
·         Some time your page will be displayed differently on different computers due to different screen resolution.
·         The browser's back button might not work as the user hopes.
·         There are still few browsers who do not support farme technology.
To create a frameset document, first you need the <frameset> element, which is used instead of the <body> element. The frameset defines the rows and columns your page is divided into, which in turn specify where each individual frame will go. Each frame is then represented by a <frame> element.
You also need to learn the <noframes> element, which provides a message for users whose browsers do not support frames.
Now we will discuss these tags in detail one by one.

Creating Frames - The <frameset> Element:

·         The <frameset> tag replaces the <body> element in frameset documents.
·         The <frameset> tag defines how to divide the window into frames.
·         Each frameset defines a set of rows or columns. If you define frames by using rows then horizontal frames are created. If you define frames by using columns then vertical farmes are created.
·         The values of the rows/columns indicate the amount of screen area each row/column will occupy.
·         Each farme is indicated by <frame> tag and it defines what HTML document to put into the frame.


Following is the example to create three horizontal frames:
<title>Frames example</title>
   <frameset rows="10%,80%,10%">
      <frame src="/html/top_frame.htm" />
      <frame src="/html/main_frame.htm" />
      <frame src="/html/bottom_frame.htm" />
      Your browser does not support frames.

The <frameset> Element Attributes:

Following are important attributes of <frameset> and should be known to you to use frameset.
·         cols: specifies how many columns are contained in the frameset and the size of each column. You can specify the width of each column in one of four ways:
o    Absolute values in pixels. For example to create three vertical frames, use cols="100, 500,100".
o    A percentage of the browser window. For example to create three vertical frames, use cols="10%, 80%,10%".
o    Using a wildcard symbol. For example to create three vertical frames, use cols="10%, *,10%". In this case wildcard takes remainder of the window.
o    As relative widths of the browser window. For example to create three vertical frames, use cols="3*,2*,1*". This is an alternative to percentages. You can use relative widths of the browser window. Here the window is divided into sixths: the first column takes up half of the window, the second takes one third, and the third takes one sixth.
·         rows: attribute works just like the cols attribute and can take the same values, but it is used to specify the rows in the frameset. For example to create two horizontal frames, use rows="10%, 90%". You can specify the height of each row in the same way as explained above for columns.
·         border: attribute specifies the width of the border of each frame in pixels. For example border="5". A value of zero specifies that no border should be there.
·         frameborder: specifies whether a three-dimensional border should be displayed between frames. This attrubute takes value either 1 (yes) or 0 (no). For example frameborder="0" specifies no border.
·         framespacing: specifies the amount of space between frames in a frameset. This can take any integer value. For example framespacing="10" means there should be 10 pixels spacing between each frames.

Loading Content - The <frame> Element:

The <frame> element indicates what goes in each frame of the frameset. The <frame> element is always an empty element, and therefore should not have any content, although each <frame> element should always carry one attribute, src, to indicate the page that should represent that frame.
From the above example, lets take small snippet:
   <frame src="/html/top_frame.htm" />
   <frame src="/html/main_frame.htm" />
   <frame src="/html/bottom_frame.htm" />

The <frame> Element Attributes:

Following are important attributes of and should be known to you to use frames.
·         src: indicates the file that should be used in the frame. Its value can be any URL. For example, src="/html/top_frame.htm" will load an HTML file avaible in html directory.
·         name: attribute allows you to give a name to a frame. It is used to indicate which frame a document should be loaded into. This is especially important when you want to create links in one frame that load pages into a second frame, in which case the second frame needs a name to identify itself as the target of the link.
·         frameborder: attribute specifies whether or not the borders of that frame are shown; it overrides the value given in the frameborder attribute on the <frameset> element if one is given, and the possible values are the same. This can take values either 1 (yes) or 0 (no).
·         marginwidth: allows you to specify the width of the space between the left and right of the frame's borders and the frame's content. The value is given in pixels. For example marginwidth="10".
·         marginheight: allows you to specify the height of the space between the top and bottom of the frame's borders and its contents. The value is given in pixels. For example marginheight="10".
·         noresize: By default you can resize any frame by clicking and dragging on the borders of a frame. The noresize attribute prevents a user from being able to resize the frame. For example noresize="noresize".
·         scrolling: controls the appearance of the scrollbars that appear on the frame. This takes values either "yes", "no" or "auto". For example scrolling="no" means it should not have scroll bars.
·         longdesc: allows you to provide a link to another page containing a long description of the contents of the frame. For example longdesc="framedescription.htm"

Browser Support - The <noframes> Element:

If a user is using any old browser or any browser which does not support frames then <noframes> element should be displayed to the user.
In XHTML you must place a <body> element inside the <noframes> element because the <frameset> element is supposed to replace the <body> element, but if a browser does not understand the <frameset> element it should understand what is inside the <body> element contained in the <noframes> element.
You can put some nice message for your user having old browsers. For example Sorry!! your browser does not support frames.

Frame's name and target attributes:

One of the most popular uses of frames is to place navigation bars in one frame and then load the pages with the content into a separate frame.
As you have already seen, each <frame> element can carry the name attribute to give each frame a name.This name is used in the links to indicate which frame the new page should load into. Consider this very simple example, create following content in index.htm file:
<frameset cols="200, *">
   <frame src="/html/menu.htm" name="menu_page" />
   <frame src="/html/main.htm" name="main_page" />
There are two columns in this example. The first is 200 pixels wide and will contain the navigation bar. The second column or frame will contain the main part of the page. The links on the left side navigation bar will load pages into the right side main page.
Keep some content in main.htm file and the links in the menu.htm file look like this:
<a href="" target="main_page">Google</a>
<br /><br />
<a href="" target="main_page">Microsoft</a>
<br /><br />
<a href="" target="main_page">BBC News</a>
To Become more comfortable - Do Online Practice
The target attribute can also take the attribute values listed in the table that follows.
Loads the page into the current frame.
Loads a page into a new browser window.opening a new window.
Loads the page into the parent window, which in the case of a single frameset is the main browser window.
Loads the page into the browser window, replacing any current frames..

Inline Frames - The <iframe> Element:

You can define an inline frame with the <iframe> tag. The <iframe> tag is not used within a <frameset> tag. Instead, it appears anywhere in your document. The <iframe> tag defines a rectangular region within the document in which the browser displays a separate document, including scrollbars and borders.
Use the src attribute with <iframe> to specify the URL of the document that occupies the inline frame.
All of the other, optional attributes for the <iframe> tag, including name, class, frameborder, id, longdesc, marginheight, marginwidth, name, scrolling, style, and title behave exactly like the corresponding attributes for the <frame> tag.
Following is the example to show how to use the <iframe>. This tag is used along with <body> tag:
...other document content...
<iframe src="/html/menu.htm" width="75" height="200" align="right">
Your browser does not support inline frames. To view this
<a href="/html/menu.htm">document</a> correctly, you'll need
a copy of Internet Explorer or the latest Netscape Navigator.
...subsequent document content...
The align attribute lets you control where the frame gets placed in line with the adjacent text or moved to the edge of the document, allowing text to flow around the frame.

Extra Note
Marquee Tags

1.          1<marquee behavior="alternate" scrollamount="10">Community Technology Access</marquee>
2.          <marquee direction="up" behavior="alternate"><marquee behavior="alternate">Damak, Bagkhor</marquee></marquee>
3.          <marquee direction="up" behavior="alternate" scrollamount="10" height="20"><marquee behavior="alternate" scrollamount="10">

<embed src=""
 autostart="false" />

Note : Here have HTML Part One 1

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