1. HTML Forms

2. Today’s Lecture We will try to understand the utility of forms on Web pages We will find out about the various components that are used in a form We will become able to build a simple, interactive form

3. Interactive Forms (1) Without forms, a Web site is “read-only” – it just provides information to the user Forms enable the user to provide information to the Web site. For example, the user can: –Perform searches on Web site –Give comments –Ask for info that is not available on the Website –Place order for goods and services

4. Interactive Forms (2) Can be simple or very complex Can fill a whole page or just a single line Can contain a single element or many Are always placed between the and tags of a Web page

5. Interactive Forms (3) Are GUI-based May contain: –Text fields –Check boxes –Buttons –Radio buttons –Scrollable lists

6. Example of a simple, interactive form

7. Code for that Example Send Email to me Send Email to me Code for the instructions Code for the form

8. Code for the Instructions To send an eMail message to me: Type your eMail address in the "From" field Type a short message in the "Message" field Press the "Send eMail to me" button

9. Code for the Form Elements of the form

10. Elements of the form name: Name given to the form method: Forms can be submitted through two alternate methods – GET & POST action: Specifies the URL that is accessed when the form is being submitted

11. Example of a simple, interactive form

12. Elements of the Form (1) From: Message:

13. Example of a simple, interactive form

14. Elements of the Form (2)

15. Example of a simple, interactive form

18. From: To: Subject: Message:

21. Review of the Tags Used in Forms

22. <FORM name=“nameOfTheForm” method=“get” or “post” action=“URL” > Elements of the form

23. Single-Line Text Input Field <INPUT type=“text” name=“fieldName” size=“widthInCharacters” maxlength=“limitInCharacters” value=“initialDefaultValue” >

24. Hidden Input

25. Submit Button Input

26. Multi-Line Text Input Area initial default value

27. This was a review of the new tags (and associated attributes) that we have used in today’s examples There are many more tags that can be used in a form Let us take a look at a few

28. User Name: Password:

29. Password Input Field <INPUT type=“password” name=“fieldName” size=“widthInCharacters” maxlength=“limitInCharacters” value=“initialDefaultValue” >

31. User Name: Password: Remember my user name and password

32. Checkbox Input Element <INPUT type=“checkbox” name=“checkboxName” checked value=“checkedValue” >

33. Office

34. User Name: Password: Logging in from: Home Home University

35. Radio Button Input Element <INPUT type=“radio” name=“radioButtonName” checked value=“selectedValue” >

37. User Name: Password: Logging in from: Home Office University

38. Select from a (Drop Down) List <SELECT name=“listName” size=“numberOfDisplayedChoices” multiple > text1 text2 …

41. File Upload Input Element <INPUT type=“file” name=“buttonName” value=“nameOfSelectedFile” enctype=“fileEncodingType” >

42. Reset Button Input Element ( Resets the contents of a form to default values ) <INPUT type=“reset” value=“displayedText” >