javascript - setting/getting/checking multiple cookies generated by user-input (textboxes) in one go -

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i'm bashing head against wall , hoping can help. i've got include 3 text boxes users enter values following cookies: name, city, , hobby. need use single button onclick event call function create 3 cookies (with values). need further function check existence of each cookie when page accessed. if 1 or more of cookies not set, alert box should notify user set unset cookie(s). if 3 cookies set, alert box should display contents of each cookie.

where hung (i think) on how pass value textbox , corresponding key arguments generic setcookie function. w3schools gives code template creating, getting , checking cookies (below) i've no idea how implement setting cookies via user-input or setting 3 @ once! thick brick, seems.

my html textboxes , submit button:

please enter name: <input type = "text" name = "name" id = "name"> <br>                 please enter city: <input type = "text" name = "city" id = "school"><br>                 please enter hobby: <input type = "text" name = "hobby" id = "hobby"><br>                 <button id = "btn12" onclick = "createcookies()">create cookies</button></p>                 </form>

w3schools cookie template:

function setcookie(cname, cvalue, exdays) {     var d = new date();     d.settime(d.gettime() + (exdays*24*60*60*1000));     var expires = "expires="+d.toutcstring();     document.cookie = cname + "=" + cvalue + "; " + expires; }  function getcookie(cname) {     var name = cname + "=";     var ca = document.cookie.split(';');     for(var i=0; i<ca.length; i++) {         var c = ca[i];         while (c.charat(0)==' ') c = c.substring(1);         if (c.indexof(name) == 0) return c.substring(name.length, c.length);     }     return ""; }  function checkcookie() {     var user = getcookie("username");     if (user != "") {         alert("welcome again " + user);     } else {         user = prompt("please enter name:", "");         if (user != "" && user != null) {             setcookie("username", user, 365);         }     } }

any appreciated! i've googled can find on setting cookies in javascript , can't make heads or tails of it.

this possible. made example using html above. it's bit long i'll include here stackoverflow expects.

html:

<p>   please enter name:   <input type="text" name="name" id="name">   <br> please enter city:   <input type="text" name="city" id="city">   <br> please enter hobby:   <input type="text" name="hobby" id="hobby">   <br>   <button id="btn12">create cookies</button> </p>

javascript:

document.getelementbyid('btn12').addeventlistener('click', createcookies);  // jsfiddle runs code after page loads -- in other environments // run on page load document.getelementbyid("name").value = getcookie("name"); document.getelementbyid("city").value = getcookie("city"); document.getelementbyid("hobby").value = getcookie("hobby");  function createcookies(evt) {   evt.preventdefault();    setcookie('name', document.getelementbyid("name").value);   setcookie('city', document.getelementbyid("city").value);   setcookie('hobby', document.getelementbyid("hobby").value); }  function setcookie(cname, cvalue, exdays) {   var d = new date();   exdays = exdays || 30; // default 30 days   d.settime(d.gettime() + (exdays * 24 * 60 * 60 * 1000));   var expires = "expires=" + d.toutcstring();   document.cookie = cname + "=" + cvalue + "; " + expires; }  function getcookie(cname) {   var name = cname + "=";   var ca = document.cookie.split(';');   (var = 0; < ca.length; i++) {     var c = ca[i];     while (c.charat(0) == ' ') c = c.substring(1);     if (c.indexof(name) == 0) return c.substring(name.length, c.length);   }   return ""; }

you can add values in inputs, click on 'create cookies' button , reload page , inputs should have values entered before.

how work? need set input values on load. there code -- these lines:

document.getelementbyid("name").value = getcookie("name"); document.getelementbyid("city").value = getcookie("city"); document.getelementbyid("hobby").value = getcookie("hobby");

if there no value, input set nothing no problem there.

on click, run code:

function createcookies(evt) {   evt.preventdefault();    setcookie('name', document.getelementbyid("name").value);   setcookie('city', document.getelementbyid("city").value);   setcookie('hobby', document.getelementbyid("hobby").value); }

that calls through setcookie function -- modified defaults 30 days (the 3rd parameter) make things bit easier.

jsfiddle: https://jsfiddle.net/z7ayebpr/


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