This example uses "oninput" event just for one textbox. If user enters an odd number, the image (on the right of textbox) is changed "OK". If even, then image shows "NO" icon. If there is no input in the box, then there is no image is shown. In a similar way, you will have three input field at one page, with the following order. Form Validation Username: Password: Email: The validation rules are as follows: The username field must contain only alphanumeric characters. The password field should be at least five characters long. The email field should be a valid email address (abc@def.xyz). In simplest form, it should contain at least "@" character and "!" Accordingly "@.", and "@" will be valid entries. Similar to above example (proj1_sample.html) you need to show OK image if entry is valid or NO image is entry is not valid.The small (25x25) image will be on the right of text fields. If user enters nothing (empty box) in box, then no image is shown (same as proj1_sample.html). To complete this assi