How to get input via a popup and place text in a variable via javascript/jquery

Question

I have a button on my page. When clicked a popup box should appear allowing the user to enter text. When OK/Submit is pressed, my jscript will then perform some functions usin

Answer 1

in it's simplest form, you could use prompt(question, default): (taken from w3schools: http://www.w3schools.com/js/tryit.asp?filename=tryjs_prompt)

function myFunction(){
    var x;
    var name=prompt("Please enter your name","Harry Potter");
    if (name!=null){
       x="Hello " + name + "! How are you today?";
      alert(x);
   }
}

anything else would require lots of javascript & CSS to create layers with buttons and click events on those buttons