programming-examples/js/Htmldom/Get the width and height of a window online.js

    function getSize()  
    {  
    var w = document.documentElement.clientWidth;  
    var h = document.documentElement.clientHeight;  
              
    // put the result into a h1 tag  
     document.getElementById('wh').innerHTML = "<h1>Width: " + w + " • Height: " + h + "</h1>";  
    }