JavaScript - Save Position Of Div In A Cookie..

Hey guys, I think this is some pretty basic JavaScript but I'm not too familiar with the language and would really appreciate some help here.
I have an image switcher script setup. Its very basic and changes the image displayed on click of a link. Here is what I currently have:

Javascript:
Code:

<script type="text/javascript">
function changeIt(imageName,objName)
{
var obj = document.getElementById(objName);

var imgTag = "<img src='"+imageName+"' border='0' />";

obj.innerHTML = imgTag;

   return;
}

</script>

HTML:
Code:

<div id="image1">
<img src="http://profile.ak.fbcdn.net/hprofile-ak-snc4/49057_100001550995222_9679_q.jpg" border="0" alt="one" />
</div>

<br>

<a id="one" href="#" onclick="changeIt('http://profile.ak.fbcdn.net/hprofile-ak-snc4/49057_100001550995222_9679_q.jpg','image1');">one</a>

<a id="two" href="#" onclick="changeIt('http://profile.ak.fbcdn.net/hprofile-ak-snc4/174411_100002333675750_7453320_q.jpg','image1');">two</a>

<a id="three" href="#" onclick="changeIt('http://profile.ak.fbcdn.net/hprofile-ak-snc4/41512_100000999943382_7276_q.jpg','image1');">three</a>

<a id="four" href="#" onclick="changeIt('http://profile.ak.fbcdn.net/hprofile-ak-snc4/41477_100001406980454_629_q.jpg','image1');">four</a>

<a id="five" href="#" onclick="changeIt('http://www.dead-paramour.org/fans/fanMCR4.jpg','image1');">five</a>

Its very basic but does what I want. What I'm attempting to do is store the image selected as a cookie so that when users refresh/navigate to other pages the image stays to the one they selected.
Is anyone able to help me out with this?

Any help is greatly appreciated.
Thanks,
Chris

Hi everyone, I am using a jQuery cookie script to set the cookie of some elements on my website. One of the problems is that I need the cookie to not expire after one day, I need it to expire after a while (I'm going to start off with a year).

Here's my script, the red part is what I've been editing.

Code:

/**
 * Cookie plugin
 *
 * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 */

/**
 * Create a cookie with the given name and value and other optional parameters.
 *
 * @example $.cookie('the_cookie', 'the_value');
 * @desc Set the value of a cookie.
 * @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secu  true });
 * @desc Create a cookie with all available options.
 * @example $.cookie('the_cookie', 'the_value');
 * @desc Create a session cookie.
 * @example $.cookie('the_cookie', null);
 * @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
 *       used when the cookie was set.
 *
 * @param String name The name of the cookie.
 * @param String value The value of the cookie.
 * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
 * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
 *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
 *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
 *                             when the the browser exits.
 * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
 * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
 * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
 *                        require a secure protocol (like HTTPS).
 * @type undefined
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */

/**
 * Get the value of a cookie with the given name.
 *
 * @example $.cookie('the_cookie');
 * @desc Get the value of a cookie.
 *
 * @param String name The name of the cookie.
 * @return The value of the cookie.
 * @type String
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */
jQuery.cookie = function(name, value, options) {
    if (typeof value != 'undefined') { // name and value given, set cookie
        options = options || {};
        if (value === null) {
            value = '';
            options.expires = -1;
        }
        var expires = '';
        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
            var date;
            if (typeof options.expires == 'number') {
                date = new Date();
 				date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000 * 365)); 
            } else {
                date = options.expires;
            }
            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
        }
        // CAUTION: Needed to parenthesize options.path and options.domain
        // in the following expressions, otherwise they evaluate to undefined
        // in the packed version for some reason...
        var path = options.path ? '; path=' + (options.path) : '';
        var domain = options.domain ? '; domain=' + (options.domain) : '';
        var secure = options.secure ? '; secure' : '';
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
    } else { // only name given, get cookie
        var cookieValue = null;
        if (document.cookie && document.cookie != '') {
            var cookies = document.cookie.split(';');
            for (var i = 0; i < cookies.length; i++) {
                var cookie = jQuery.trim(cookies[i]);
                // Does this cookie string begin with the name we want?
                if (cookie.substring(0, name.length + 1) == (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }
};

I'm new to javascript and am not sure why this works in firefox and not chrome.
I am trying to create a script that keeps an object fixed horizontally while bing positioned absolute vertically.

if I replace the toPP variable in document.getElementById('fire').style.top = toPP; with say '50px' it will move the element down 50 pxs, but how I have it currently it doesn't do anything in chrome

Code:

<script type="text/javascript" >
	
	
window.onscroll = function() 
{
	if( window.XMLHttpRequest ) { 
		
			
			var x = 0 -document.documentElement.scrollTop;
			var toP = String(x);
			var toPP = toP + "px";
			
			document.getElementById('fire').style.position = 'fixed'; 
			document.getElementById('fire').style.top = toPP;
				
	}
}
	</script>

I need to convert a position:fixed element to position:absolute when the user resize their browser window below 1000px.

Right now it does nothing. The element always keeps the fixed positioning even after resizing the window.

Here's what I have right now:

Code:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<base href="http://www.area51entertainment.co/" />
<title>Emoto <?php echo "$section"; ?></title>
<meta charset="UTF-8" /> 
<meta name="verify-v1" content="" />
<meta name="keywords" content=""  />
<meta name="description" content="" />
<meta name="author" content="Andrew McCarrick" />
<meta name="robots" content="index, follow" />
<style type="text/css">
body,html {
background: #FFFFFF; /* Old browsers */
color: #000000; 
font-family: Verdana; 
margin-right:auto;
margin-left:auto;
max-width:1000px;
padding: 0px;
margin-top: 0px;
margin-bottom: 0px;
}
</style>
<link rel="stylesheet" href="emoto/style.css" media="screen" />
<link rel="shortcut icon" type="image/x-icon" href="/favicon.ico" />
<link rel="apple-touch-icon" href="http://www.area51entertainment.co/TouchIcon.png" />
<link rel="apple-touch-icon-precomposed" href="http://www.area51entertainment.co/TouchIcon.png" /> 
<link rel="image_src" href="./logo.png" /> 
<script language="javascript" src="emoto/float.js"></script>

</head>
<body>
<div class="wrapper">
<div id="header_float">
<div class="header_wrapper">
<div class="logo">
Picture
</div>
<div class="links">
Home | Settings | Notifications | Requests | Messages | Search Bar
</div>
<div class="links_right">
Profile Link/Sign-Out 
</div>
</div>
</div>
<div class="content_wrapper">
Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 
Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 
Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 
Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 T
est2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2Test2Test2 Test2
</div>
</div>
</body>
</html>

style.css
Code:

a:link {color: #FFFFFF; text-decoration: none;}
a:visited {color: #FFFFFF; text-decoration: none;}
a:active {color: #FFFFFF; text-decoration: none;}
a:hover {color: #3399FF; text-decoration: none;}

.wrapper{
min-height: 2000px;
min-width: 1000px;
}

#header_float{
width: 100%;
min-width: 1000px;
height: 35px;
left:0;
right:0;
top:0;
position: fixed;
background: #49963A;
z-index: 1000;
}

.header_wrapper{
width: 1000px;
height: 35px;
margin-right:auto;
margin-left:auto;
padding: 0px;
margin-top: 0px;
margin-bottom: 0px;
color: #FFFFFF;
}

.logo{
float: left;
width: 150px;
height: 25px;
font-size: 26px;
position: relative;
top: -1px;
left: 8px;
}

.links{
float: left;
width: 670px;
height: 25px;
position: relative;
top: 7px;
}

.links_right{
float: right;
width: 180px;
height: 25px;
position: relative;
top: 7px;
}

.content_wrapper{
position: relative;
top: 35px;
width: 995px;
min-height: 450px;
}

img{
border: 0px;
}

float.js
Code:

if (screen.availWidth<=999)
document.getElementById('header_float').style.position = 'absolute';
else
document.getElementById('header_float').style.position = 'fixed';

Hey, I'm trying to make a game, I learned how to do so by reading tutorials but the problem is that I do not know how to implement the save/load function into the game, the tutorial surrounding that area was very unclear to me, and here I am...
Any tips on how to make this work is greatly appreciated, I wouldn't asked if I hadn't tried my best and every way I could think of. I'm still quite new to coding so...

The first piece of code is the game, the second one is what I'm trying to make the game work with.
I tried for a while and got the game to reset back to values, but only the values I set in the code so it never actually worked.
The tutorial doesn't give any live examples and I really am... not that bright when it comes to coding

Sorry and thanks, all inputs are appreciated.

I read tutorial from links below,
Javascript String Compression | Almost Idle Tutorial for save code
Incremental Lesson 9 - For Loops | Almost Idle Tutorial for the game code

Code:

/*Pleae refer to Lesson 9.txt for a full description on this lesson*/

//The timer to run code every second
var Timer = window.setInterval(function(){Tick()}, 1000);
var buildings = [];

//The object declaration for game saves
function GameSave() {
	this.money = 0;
	this.buildings = [];
	for (var i = 0;i < buildings.length;i++) {
		this.buildings[i] = 0;
	}
}

//The object declaration for buildings
function Building() {
	this.Name = "Lemonade Stand";
	this.Cost = 10;
	this.PerSec = 1;
}

//The function to initialise all buildings
function InitBuildings() {
	LoadBuilding("Lemonade Stand",10,1);
}

//The function to automatically load a building into the buildings array
function LoadBuilding(name,cost,persec) {
	var cur = buildings.length;
	
	buildings[cur] = new Building();
	buildings[cur].Name = name;
	buildings[cur].Cost = cost;
	buildings[cur].PerSec = persec;
}

//The function used to gather money
function GatherMoney() {
	game.money++; //++ tells javascript to add 1 to the variable
	
	//Display the player's current money
	document.getElementById("money").innerHTML = game.money;
}

//The function that gets run every second
function Tick() {
	for (var i = 0;i < buildings.length;i++) {
		game.money += game.buildings[i] * buildings[i].PerSec;
	}
	document.getElementById("money").innerHTML = game.money;
}

//The function to buy a lemonade stand
function Build(id) {
	if (game.money >= buildings[id].Cost) { //Check if the player has enough money, then subtract it and add a new building if they do
		game.money -= buildings[id].Cost;
		game.buildings[id] = game.buildings[id] + 1;
		document.getElementById("money").innerHTML = game.money;
		document.getElementById("Building1Qty").innerHTML = game.buildings[id];
	}
}

//Run this code once the page has loaded fully
window.onload = function() {
	InitBuildings();
	window.game = new GameSave();
};

Code:

/*Pleae refer to Compression.txt for a full description on this lesson*/

function NewGame() {
	this.name = "Our Game";
	this.description = "Our Game's Description";
	this.numbers = [];
	for (var i=0;i<10;i++) {
		this.numbers[i] = i;
	}
}

var Game = new NewGame();

window.onload = function() {
	var SaveGame = JSON.stringify(Game);
	SaveGame = encode_utf8(SaveGame);
	SaveGame = lzw_encode(SaveGame);
	window.localStorage['SaveName'] = SaveGame;
	
	
	SaveGame = window.localStorage['SaveName'];
	SaveGame = lzw_decode(SaveGame);
	SaveGame = decode_utf8(SaveGame);
	window.GameTwo = JSON.parse(SaveGame);
	
	document.getElementById("name").innerHTML = "Name: " + GameTwo.name;
	document.getElementById("desc").innerHTML = "Description: " + GameTwo.description;
	var numbers = "";
	for (var i=0;i<10;i++) {
		if (numbers.length == 0) {numbers = i;} else {numbers += ", " + i;}
	}
	document.getElementById("numbers").innerHTML = "Numbers: " + numbers;
}

// LZW-compress a string
function lzw_encode(s) {
    var dict = {};
    var data = (s + "").split("");
    var out = [];
    var currChar;
    var phrase = data[0];
    var code = 256;
    for (var i=1; i<data.length; i++) {
        currChar=data[i];
        if (dict['_' + phrase + currChar] != null) {
            phrase += currChar;
        }
        else {
            out.push(phrase.length > 1 ? dict['_'+phrase] : phrase.charCodeAt(0));
            dict['_' + phrase + currChar] = code;
            code++;
            phrase=currChar;
        }
    }
    out.push(phrase.length > 1 ? dict['_'+phrase] : phrase.charCodeAt(0));
    for (var i=0; i<out.length; i++) {
        out[i] = String.fromCharCode(out[i]);
    }
    return out.join("");
}

// Decompress an LZW-encoded string
function lzw_decode(s) {
    var dict = {};
    var data = (s + "").split("");
    var currChar = data[0];
    var oldPhrase = currChar;
    var out = [currChar];
    var code = 256;
    var phrase;
    for (var i=1; i<data.length; i++) {
        var currCode = data[i].charCodeAt(0);
        if (currCode < 256) {
            phrase = data[i];
        }
        else {
           phrase = dict['_'+currCode] ? dict['_'+currCode] : (oldPhrase + currChar);
        }
        out.push(phrase);
        currChar = phrase.charAt(0);
        dict['_'+code] = oldPhrase + currChar;
        code++;
        oldPhrase = phrase;
    }
    return out.join("");
}

function encode_utf8(s) {
  return unescape(encodeURIComponent(s));
}

function decode_utf8(s) {
  return decodeURIComponent(escape(s));
}

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01-16-2015, 05:52 PM #2
Dormilich View Profile View Forum Posts

Senior Coder Join Date Jan 2010 Location Behind the Wall Posts 3,532 Thanks 13 Thanked 372 Times in 368 Posts


the problem is that I do not know how to implement the save/load function into the game


save it where? that particular question is important as JavaScript has only limited places where it can save something at all.

1) save it on the server => call a server script with the appropriate data (e.g. via AJAX)
2) cookies, very limited storage space, only works on the same browser
3) WebStorage, more space than cookies, but still only the same browser
4) IndexedDB (same as above)