Chapter 13: Forms
Forms...
Forms allow you to add interactivity to your web documents by way of the <FORM> tag.
With the form tag you can add to your web pages a guestbook, order forms, surveys, get feedback or whatever.
The basic construction of a html form is this...
<FORM> begin a form
<INPUT> ask for information in one of several different ways...
<INPUT> ...there can be as many input areas as you wish
</FORM> end a form
The <INPUT> tag provides the user with various ways of inputting information. There are several different <INPUT> tags.
Form Input...
Text
The most common TYPE of form <INPUT> is TEXT.
<INPUT TYPE=TEXT>
Every input needs a NAME.
<INPUT TYPE=TEXT NAME="ADDRESS">
When the user types in his address (for example 1313 Mockingbird Lane), it will become the input's value and be paired with ADDRESS so the end result after running it through Mailto Formatter will be ADDRESS=1313 Mockingbird Lane.
We can if we want, type in a VALUE.
<INPUT TYPE=TEXT NAME="ADDRESS" VALUE="44 Cherry St">
This will automatically pair the value 44 Cherry St with the name ADDRESS, unless the user changes it. Note- be sure to use quotes where I've specified.
We can specify the size of the text input box.
<INPUT TYPE=TEXT NAME="ADDRESS" VALUE="44 Cherry St" SIZE=10>
<INPUT TYPE=TEXT NAME="ADDRESS" VALUE="44 Cherry St" SIZE=20>
<INPUT TYPE=TEXT NAME="ADDRESS" VALUE="44 Cherry St" SIZE=30>
The default value is 20.
If we want, we can specify how many characters a user can input.
Go ahead and try to input more than 10 characters in the text box below:
<INPUT TYPE=TEXT NAME="ADDRESS" SIZE=30 MAXLENGTH=10>
Very similar to the TYPE=TEXT is the TYPE=PASSWORD.
It is exactly the same, except it dispays *** instead of the actual input.
The browser will send you the input, it just won't display it.
<INPUT TYPE=PASSWORD>
Remember that each <INPUT> must have a NAME.
<INPUT TYPE=PASSWORD NAME="USER PASSWORD">
SIZE, VALUE, and MAXLENGTH modifiers/attributes work here also. By the way, a <TAG> tells the browser to do something.
Radio Buttons and Check Boxes
Radio buttons allow the user to choose one of several options. Check Boxes allow the user to choose one or more or all of the options.
First let's build some Radio Buttons.
<INPUT TYPE=RADIO NAME="POSITION">
Now add 2 more.
<INPUT TYPE=RADIO NAME="POSITION">
<INPUT TYPE=RADIO NAME="POSITION">
<INPUT TYPE=RADIO NAME="POSITION">
Hmmm... I suppose we should put a line break after each one.
<INPUT TYPE=RADIO NAME="POSITION"><BR>
<INPUT TYPE=RADIO NAME="POSITION"><BR>
<INPUT TYPE=RADIO NAME="POSITION"><P>
Note that each input has the same name. The reason will become apparent very shortly.
Each of the Radio Buttons must be assigned a VALUE.
<INPUT TYPE=RADIO NAME="POSITION" VALUE="PB"><BR>
<INPUT TYPE=RADIO NAME="POSITION" VALUE="DBA"><BR>
<INPUT TYPE=RADIO NAME="POSITION" VALUE="NOTA"><P>
Now label each button.
<INPUT TYPE=RADIO NAME="POSITION" VALUE="PB"> Powerbuilder Developer<BR>
<INPUT TYPE=RADIO NAME="POSITION" VALUE="DBA"> Database Administrator<BR>
<INPUT TYPE=RADIO NAME="POSITION" VALUE="NOTA"> None of the above<P>
You can also modify these labels with other html tags if you wish.
Essentially your Radio Buttons are done. You can tidy things up by adding a statement above the buttons, and if you want, choose a default selection (optional).
What is your position within the company?<BR>
<INPUT TYPE=RADIO NAME="POSITION" VALUE="PB" CHECKED> Powerbuilder Developer<BR>
<INPUT TYPE=RADIO NAME="POSITION" VALUE="DBA"> Database Administrator<BR>
<INPUT TYPE=RADIO NAME="POSITION" VALUE="NOTA"> None of the above<P>
The user of course can only choose 1 option. Their choice will be returned to you as the name/value pair POSITION=PB (or whichever they pick).
Building Check Boxes is pretty much the same thing. Start with this.
<INPUT TYPE=CHECKBOX NAME="PB">
Add 3 more, but this time give each one a different NAME. (Also add in line breaks if you want)
<INPUT TYPE=CHECKBOX NAME="PB"><BR>
<INPUT TYPE=CHECKBOX NAME="DBA"><BR>
<INPUT TYPE=CHECKBOX NAME="NOTA"><BR>
Each Check Box gets the same VALUE.
<INPUT TYPE=CHECKBOX NAME="PB" VALUE="YES"><BR>
<INPUT TYPE=CHECKBOX NAME="DBA" VALUE="YES"><BR>
<INPUT TYPE=CHECKBOX NAME="NOTA" VALUE="YES"><BR>
Note- For Check Boxes the NAME changes and the VALUE stays the same and with Radio Buttons, the VALUE changes but the NAME stays the same. Don't feel bad, my simple mind still gets confused.
OK, let's label each box.
<INPUT TYPE=CHECKBOX NAME="PB" VALUE="YES"> Powerbuilder Developer<BR>
<INPUT TYPE=CHECKBOX NAME="DBA" VALUE="YES"> Database Administrator<BR>
<INPUT TYPE=CHECKBOX NAME="NOTA" VALUE="YES"> None of the above<BR>
And lastly, you may want to add a little something above your check boxes and maybe pick a couple defaults.
What positions do you occupy within the company?<BR>
<INPUT TYPE=CHECKBOX NAME="PB" VALUE="YES" CHECKED> Powerbuilder Developer<BR>
<INPUT TYPE=CHECKBOX NAME="DBA" VALUE="YES" CHECKED> Database Administrator<BR>
<INPUT TYPE=CHECKBOX NAME="NOTA" VALUE="YES"> None of the above<BR>
The user can choose 1, 2, none or all of the options. Their choices will be returned to you as the name/value pairs...
PB=YES
DBA=YES
(or what ever they choose... if they choose nothing, nothing will be returned to you)
Your own HTML page...
We will now construct the feedback page we created in Chapter 11. Open the blank page "feedback.htm" in Notepad, and
add the following (the blue text is what to add).
<html>
<body background="bgnd.gif" bgcolor=#FFFFFF>
<center><h1>Feedback Form</h1></center>
<br>
<form>
<b>My name is: </b><input type=text name="name">
<p>
<b>I work as a:</b><br>
<input type=radio name="position" value="Developer" checked>Developer<br>
<input type=radio name="position" value="ProjMan">Project Manager<br>
<input type=radio name="position" value="TechMan">Technical Manager<br>
<input type=radio name="position" value="NOTA">None of the above
</p>
<p>
<b>When it comes to web browsers:</b><br>
<input type=checkbox name="Netscape" checked>I use Netscape Navigator<br>
<input type=radio name="NetscapeVer" value="2.0">version 2.0<br>
<input type=radio name="NetscapeVer" value="3.0" checked>version 3.0<br>
<input type=checkbox name="IExplorer">I use Microsoft Internet Explorer<br>
<input type=radio name="IEVer" value="2.0">version 2.0<br>
<input type=radio name="IEVer" value="3.0">version 3.0<br>
</p>
</body>
</html>
Save the file.
Go To Chapter 14
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