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

Paste this code inside your head tags between script tags

HTML

Get Text​

JS

window.onload=function()
{
    var el=document.getElementById('button');
    el.onclick=function(){
        var my_text=prompt('Enter text here');
        if(my_text) alert(my_text); // for example I've made an alert
    }
}

DEMO.