how to ask input in javascript

Input Text Object
The Input Text object represents an HTML <input> element with type="text".

Access an Input Text Object
You can access an <input> element with type="text" by using getElementById():

Example
var x = document.getElementById("myText");
Tip: You can also access <input type="text"> by searching through the elements collection of a form.

Create an Input Text Object
You can create an <input> element with type="text" by using the document.createElement() method:

Example
var x = document.createElement("INPUT");
x.setAttribute("type", "text");Copyvar name = window.prompt("Enter your name: ");
alert("Your name is " + name);