<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/> <link rel="stylesheet" type="text/css" href="css/bootstrap.css" /> </head> <body> <nav class="navbar navbar-default"> <div class="container-fluid"> </div> </nav> <div class="col-md-6 well"> <hr style="border-top:1px dotted #ccc;"/> <div class="col-md-4"> <div class="form-group"> <input type="number" class="form-control" id="length" required="required"/> </div> <div class="form-group"> <input type="number" class="form-control" id="height" required="required"/> </div> </div> <div class="col-md-8"> <br /> </div> </div> </body> </html>
function reset(){ document.getElementById('height').value = ""; document.getElementById('length').value = ""; document.getElementById('result').innerHTML = ""; document.getElementById('btn').removeAttribute('disabled'); } function calculateArea(btn){ var height = document.getElementById('height').value; var length = document.getElementById('length').value; var area = (length * height); btn.setAttribute('disabled', 'disabled'); document.getElementById('result').innerHTML = "<center><label style='font-size:26px;'>The Area of rectangle is</label> <br /><span class='text-primary' style='font-size:30px;'>"+area+"</span></center>"; }