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Forms
Define a form:
<![CDATA[
<FORM action=URL method=post> . . . </FORM>
Attributes:
action="URL" :
program that will process the form or
email address where to send the form.
method="post" or "get" :
method how the called program accesses the form data.
* "post": from stdin
* "get": from HTTP environment variable "QUERY_STRING"
]]>
Input Field: Assigns a value to a variable.
<![CDATA[
<INPUT> (there is no ending tag)
Attributes:
name="textstring"
: symbolic name (not displayed) identifying the input variable
type="variable_type"
: specifies the data type for the variable
* "text" and "password"
* "checkbox"
* "radio" : radio buttons
* "submit" : action button that submits the form to server
* "reset" : button that resets the form to default values
* "hidden" : invisible input field
* "image" : image map within a form and returns
the coordinates of a mouse click within the image
value="textstring"
: meaning of textstring depends on the argument for type:
* "text" or "password" : default value
* "checkbox" or "radio" : textstring will be sent to server
if the checkbox is "checked"
* "reset" or "submit" : textstring will appear button
checked No arguments.
size="display_width"
maxlength="string_length"
EXAMPLE:
<INPUT type="text" name="text1" value="default text">
<INPUT type="password" name="password1" value="ciao">
<INPUT type="checkbox" name="checkbox1" value="checkbox">
<INPUT type="radio" name="radio1" value="radio">
]]>
Select Field: Displays a set of optional list items.
<![CDATA[
<SELECT multiple>
<OPTION>Apples
<OPTION selected>Bananas
<OPTION>Cherries
</SELECT>
Attributes:
name="textstring"
: symbolic identifier for the select field variable
size="list_length"
: number of <OPTION> items that will be
multiple No arguments
: allows selection of more than one <OPTION> value
]]>
Text Area: Rectangular field to enter text data.
<![CDATA[
<TEXTAREA> . . . default text . . . </TEXTAREA>
Attributes:
name="textstring"
: symbolic name that identifies the <TEXTAREA> variable
rows="num_rows" and cols="numcols"
]]>
It is useful to layout the elements of a form in a table.