<!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="text" id="firstname" class="form-control"/> </div> <div class="form-group"> <input type="text" id="lastname" class="form-control"/> </div> <div class="form-group"> <input type="text" id="address" class="form-control"/> </div> <div class="form-group"> </div> </div> <div class="col-md-8"> <div class="form-inline"> <input type="number" id="row" style="width:80px;" class="form-control"/> </div> <br /> <table class="table table-bordered"> <thead class="alert-info"> <tr> </tr> </thead> </table> </div> </div> </body> </html>
var data = []; function saveData(){ var firstname = document.getElementById("firstname"); var lastname = document.getElementById("lastname"); var address = document.getElementById("address"); if(firstname.value == "" || lastname.value == "" || address.value == ""){ alert("Please complete the required field first!"); }else{ var member = { 'firstname': firstname.value, 'lastname': lastname.value, 'address': address.value, }; data.push(member); displayData(data.length); firstname.value = ""; lastname.value = ""; address.value = ""; } } function changeRow(){ var row=document.getElementById('row').value; if(row=="" || row<=0){ alert("Please enter a valid number"); }else{ if(data.length == 0){ alert("No data found!"); }else{ displayData(row); } } } function displayData(length){ var table = "" ; for(var i=0; i<length; i++){ table += "<tr>"; table += "<td>" + data[i].firstname +"</td>" + "<td>" + data[i].lastname +"</td>" + "<td>" + data[i].address +"</td>" ; table += "</tr>"; } document.getElementById("result").innerHTML = table; }