Tut 06 (forms)
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This document provides instructions on creating HTML forms. It discusses the common elements of forms, including input boxes, radio buttons, selection lists, checkboxes, and text areas. It explains that a CGI script is used to process form data submitted by the user. The document provides syntax and examples for implementing each of the different form elements and attributes like default values, size, and text wrapping. It also covers how to write CGI scripts in various programming languages to handle submitted form data.
Tut 06 (forms)
- 2. HTML files or part of files made to be filled in by viewer / reader for the purpose of submitting information to the form’s originator. HTML Forms
- 3. CGI ( Common Gateway Interface) Script is any program or set of commands running on the Web server that receives data from the Web page and then acts on that data to perform a certain task.
- 4. Elements of Forms: Input boxes – for text and numerical entries Radio buttons – also called option buttons, to select a single option from a predefined list Selection lists – for long lists of options, usually in a drop-down list box
- 5. Check boxes – to specify an item as either being present or absent Text areas – for extended entries that might include several lines of text Submit and Reset buttons – to either submit the form to the CGI script or to reset the form to its original state
- 6. CGI script can be written in variety of computer languages such as the following: AppleScript C / C++ Perl The UNIX shell TCL Visual Basic JavaScript
- 7. Syntax of Form: <FORM Properties> Form elements and layout tags </FORM>
- 8. Working with Input Boxes Input Box – is a single-line box into which the user can enter text or numbers. Syntax: <INPUT TYPE = Option NAME = Text> where option is the type of input field, and Text is the name assigned to the input field.
- 10. Setting a Default Value for an Input Box <INPUT SIZE = “value”> where value is the default text or number that will appear in the field.
- 12. Creating a Password field <INPUT TYPE = PASSWORD> Password Field – is identical to an input box except that the characters typed by the user are displayed as bullets or asterisks.
- 13. CREATING A SELECTION LIST To create a selection list, use the following set of HTML tags: <SELECT NAME = Text> <OPTION> Option 1 <OPTION> Option 2 <OPTION> Option 3 . . </SELECT> Where the NAME property is the field name of the selection list, and each <OPTION> tag represents an entry in the list.
- 14. <SELECT NAME=Product> <OPTION>Scanmaster <OPTION>Scanmaster II <OPTION>LaserPrint 1000 <OPTION>LaserPrint 5000 <OPTION>Print/Scan 150 <OPTION>Print/Scan 250 </SELECT> Example
- 15. To allow the user to select multiple items in the selection list, use the following tag: <SELECT MULTIPLE> To display several items in the selection list, or to change the selection list style from a drop-down list box to a fully displayed list box, use the following tag: <SELECT SIZE = value> where value is the number of items displayed in the list box.
- 16. Working with Radio Buttons Syntax: <INPUT TYPE = RADIO NAME=Text VALUE=value> Where text is the name assigned to the field containing the radio button, and value is the value of the radio button.
- 17. Example <INPUT TYPE=RADIO NAME=USE VALUE=HOME>Home <INPUT TYPE=RADIO NAME=USE VALUE=BUS>Business <INPUT TYPE=RADIO NAME=USE VALUE=GOV>Government <INPUT TYPE=RADIO NAME=USE VALUE=ED>Educational Institution <INPUT TYPE=RADIO NAME=USE VALUE=OTHER>Other
- 18. To create a radio button, use the following HTML tag: <SELECT TYPE=RADIO NAME=text VALUE=value> Where the NAME property specifies the field containing the radio button, and the VALUE property specifies the value sent to the CGI script. To make a particular radio button the default option, use the following tag: <SELECT TYPE=RADIO CHECKED>
- 19. WORKING WITH CHECK BOXES To create a check box, use the following tag: <SELECT TYPE=CHECKBOX NAME=Text VALUE=Value> where the NAME property specifies the field containing the check box, and the VALUE property specifies the value sent to the CGI script if the check box is selected. To make a check box selected by default, use the following tag: <SELECT TYPE=CHECKBOX CHECKED>
- 20. Example <INPUT TYPE=CHECKBOX NAME=WIN9598NT>Windows 95/98/NT <INPUT TYPE=CHECKBOX NAME=WINDOS>Windows 3.X/DOS <INPUT TYPE=CHECKBOX NAME=MAC>Macintosh <INPUT TYPE=CHECKBOX NAME=UNIX>UNIX <INPUT TYPE=CHECKBOX NAME=OTHER>Other
- 21. CREATING A TEXT AREA To create a text area for extended text entry, use the following tag: <TEXTAREA> Default Text </TEXTAREA> Where the Default Text is the text that initially appears in the text area (this is optional) To control how text is wrapped in a text area, use the following tag: <TEXTAREA WRAP=Option> Where option is OFF, SOFT (or VIRTUAL) ,or HARD (or PHYSICAL). OFF turns off text wrapping. SOFT (VIRTUAL) turns text wrapping on, but does not send text wrapping information to the Web server. HARD (PHYSICAL) turns text wrapping on and also sends this information to the Web server.
- 22. Example <TEXTAREA ROWS=3 NAME=COMMENTS>Enter comments here </TEXTAREA>
- 23. Fin