Validation and xml writing functionaity for email form

We are [login to view URL] a Peruvian startup specialized on content aggregation. In this project you will provide a simple validation and writing functionality for email input box. Case 1: Invalid email address After clicking on subscribe, the message "Email is invalid" will be displayed on top of the text box if user enters an invalid email address. This means that the input data must contain an "@" sign and at least one dot (.). Also, the "@" must not be the first character of the email address, and the last dot must be present after the "@" sign, and minimum 2 characters before the end. Case 2: Valid email address After clicking on subscribe, the registration form will be replaced by the text "Thanks for subscribing, we will soon have news for you", and the email address (new record) will be stored on a file named [login to view URL] that already exists and has the following structure. <?xml version="1.0"?> <users> <user> <mail></mail> </user> </users> Considerations: - Validation will not require the user to leave or refresh the page (consider using ajax) - Visit www. f o u n d e r s .com for a working example of the task requested - You have 1 day to complete the project - See the word attachment for further details