XML : Generate the XML from user input value in HTML form & submit to client side email application as attachment using javascript

I've gone through the link/post How to output HTML form data to a XML file using Javascript? & it helped me a lot in my requirement. I'm totally new to this world. Barely understand the HTML, CSS, XML & JavaScript. From the share post I'm able to generate & download an XML file however my requirement is to generate an new XML file with a dynamic name from the user input value in html form & submit to the client side email application as attachment (as the mailto functionality in html) upon clicking the submit button using java script.

Thanks in advance. I do appreciate for you support.