Style Sheet Switcher (v1.1)

[jscheuer1]

I found the cookie and these are the saved values:

name: lastvisit
content: expires+in+60+minutes

That's not this script's cookie. This script's cookie is named "mysheet" (for this purpose, if you're using random mode, there are other names - "mysheet_s" and "mysheet_r" depending upon the settings). And, unless you're using random mode, this:

var manual_or_random="manual" //"manual" or "random"
var randomsetting="3 days" //"eachtime", "sessiononly", or "x days (replace x with desired integer)". Only applicable if mode is random.

has no meaning, which is the case, as it's using "manual".

The way to set the duration for manual mode is with the call(s), in this case these two links:

<a href="#" onclick="chooseStyle('light')"><b>Light</b></a>/<a href="#" onclick="chooseStyle('dark')"><b>Dark</b></a

Those should return false BTW. But to get them to set a cookie, you need to specify the number of days there as an integer. So putting that together with the recommended return value:

<a href="#" onclick="chooseStyle('light', 3); return false;"><b>Light</b></a>/<a href="#" onclick="chooseStyle('dark', 3); return false;"><b>Dark</b></a

[silviu6482]

John, you're a life saver
Worked like a charm!

I'm still fiddling around with site building html/php/js... but most of the time I'm lost.
So thank you for your time and help!

Silviu

[delightdesign]

Hi there, fascinating stuff. I also came up against the Safari issue and so have been implementing this solution on a testing trial domain name.

its some quite complicated ideas i have to express, but as simply as i can say, i noticed that the alternative styles select in addition to the default style.

so lets say default style has a css margin of 20px on the an html footer element. the alternate styles would then require a margin 0px in each one for them to not have the 20px.

ok, also, another issue this causes is (check out an on older low spec computer, or Google Chrome) when you select a style, you see a flash of the default style, then the selected style applies.

the way around these issues on my previous Safari 5.1 buggy solution was to build a template css style, which consists of no graphics, a standard set of widths, margins etc for applicable to all styles, and then for only the differences from this standard css style to be declared in the alternative styles.

this also mitigates the issue in low spec machines / in Chrome, whereby, the flash you see between selecting alternate styles (most obvious with a cleared browser cache) then is a flash of white screen (in this template style even the font color is set to white), so its kind of nicer than a flash of a default style.

to see what im on about in action check out, http://www.delightwebdesign.co.uk/ for the 5.1 safari buggy implementation.


so basically, im working on implementing this solution using the same principle to avoid the issues of having to overwrite the default style quirks with css "nones" etc on the other styles as well as mitigating the default style switch flash to a white screen rather than to the default style.


so the issue i have is that i would like to know how to select a default alternate style (eg the first "corporate" one), if there is no cookie record of the user previously choosing their own.

currently, the situation can be seen on my trial testing domain http://wowb.co.uk/ whereby the default style selected is the mostly completely blank template style, until the user selects their own.

so im working on this part time, i dont have enough JavaScript expertise to know how to edit the below code to fulfil this tweak, basically, what im talking about is a default alternate style for the reasons above. if anyone could give a pointer i would be most appreciative.

//Style Sheet Switcher version 1.1 Oct 10th, 2006
//Author: Dynamic Drive: http://www.dynamicdrive.com
//Usage terms: http://www.dynamicdrive.com/notice.htm

//Unofficial Update to fix Safari 5.1 glitch re: alternate stylesheets or the disabled property in regards to them
// See: http://www.dynamicdrive.com/forums/showthread.php?p=259199 for more info

var manual_or_random="manual" //"manual" or "random"
var randomsetting="eachtime" //"eachtime", "sessiononly", or "x days (replace x with desired integer)". Only applicable if mode is random.

//////No need to edit beyond here//////////////

function getCookie(Name) { 
var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
if (document.cookie.match(re)) //if cookie found
return document.cookie.match(re)[0].split("=")[1] //return its value
return null
}

function setCookie(name, value, days) {
var expireDate = new Date()
//set "expstring" to either future or past date, to set or delete cookie, respectively
var expstring=(typeof days!="undefined")? expireDate.setDate(expireDate.getDate()+parseInt(days)) : expireDate.setDate(expireDate.getDate()-5)
document.cookie = name+"="+value+"; expires="+expireDate.toGMTString()+"; path=/";
}

function deleteCookie(name){
setCookie(name, "moot")
}


function setStylesheet(title, randomize){ //Main stylesheet switcher function. Second parameter if defined causes a random alternate stylesheet (including none) to be enabled
var i, cacheobj, altsheets=[""];
if(setStylesheet.chosen)
try{
document.getElementsByTagName('head')[0].removeChild(setStylesheet.chosen);
}catch(e){}
for(i=0; (cacheobj=document.getElementsByTagName("link")[i]); i++) {
if(cacheobj.getAttribute("rel").toLowerCase()=="alternate stylesheet" && cacheobj.getAttribute("title")) { //if this is an alternate stylesheet with title
cacheobj.disabled = true
altsheets.push(cacheobj) //store reference to alt stylesheets inside array
if(cacheobj.getAttribute("title") == title){ //enable alternate stylesheet with title that matches parameter
cacheobj.disabled = false //enable chosen style sheet
setStylesheet.chosen = document.createElement('link');//cloneNode(false);
setStylesheet.chosen.rel = 'stylesheet';
setStylesheet.chosen.type = 'text/css';
if(cacheobj.media)
setStylesheet.chosen.media = cacheobj.media;
setStylesheet.chosen.href = cacheobj.href;
document.getElementsByTagName('head')[0].appendChild(setStylesheet.chosen);
}
}
}
if (typeof randomize!="undefined"){ //if second paramter is defined, randomly enable an alt style sheet (includes non)
var randomnumber=Math.floor(Math.random()*altsheets.length)
altsheets[randomnumber].disabled=false
}
return (typeof randomize!="undefined" && altsheets[randomnumber]!="")? altsheets[randomnumber].getAttribute("title") : "" //if in "random" mode, return "title" of randomly enabled alt stylesheet
}



function chooseStyle(styletitle, days){ //Interface function to switch style sheets plus save "title" attr of selected stylesheet to cookie
if (document.getElementById){
setStylesheet(styletitle)
setCookie("mysheet", styletitle, days)
}
}

function indicateSelected(element){ //Optional function that shows which style sheet is currently selected within group of radio buttons or select menu
if (selectedtitle!=null && (element.type==undefined || element.type=="select-one")){ //if element is a radio button or select menu
var element=(element.type=="select-one") ? element.options : element
for (var i=0; i<element.length; i++){
if (element[i].value==selectedtitle){ //if match found between form element value and cookie value
if (element[i].tagName=="OPTION") //if this is a select menu
element[i].selected=true
else{ //else if it's a radio button
element[i].checked=true
}
break
}
}
}
}

if (manual_or_random=="manual"){ //IF MANUAL MODE
var selectedtitle=getCookie("mysheet")
if (document.getElementById && selectedtitle!=null) //load user chosen style sheet from cookie if there is one stored
setStylesheet(selectedtitle)
}
else if (manual_or_random=="random"){ //IF AUTO RANDOM MODE
if (randomsetting=="eachtime")
setStylesheet("", "random")
else if (randomsetting=="sessiononly"){ //if "sessiononly" setting
if (getCookie("mysheet_s")==null) //if "mysheet_s" session cookie is empty
document.cookie="mysheet_s="+setStylesheet("", "random")+"; path=/" //activate random alt stylesheet while remembering its "title" value
else
setStylesheet(getCookie("mysheet_s")) //just activate random alt stylesheet stored in cookie
}
else if (randomsetting.search(/^[1-9]+ days/i)!=-1){ //if "x days" setting
if (getCookie("mysheet_r")==null || parseInt(getCookie("mysheet_r_days"))!=parseInt(randomsetting)){ //if "mysheet_r" cookie is empty or admin has changed number of days to persist in "x days" variable
setCookie("mysheet_r", setStylesheet("", "random"), parseInt(randomsetting)) //activate random alt stylesheet while remembering its "title" value
setCookie("mysheet_r_days", randomsetting, parseInt(randomsetting)) //Also remember the number of days to persist per the "x days" variable
}
else
setStylesheet(getCookie("mysheet_r")) //just activate random alt stylesheet stored in cookie
} 
}

[jscheuer1]

I admit the styles are simple, but my demo doesn't have that problem in Chrome, at least not on my computer:

http://home.comcast.net/~jscheuer1/side/style_switch/

If, in your scheme there are different background images, you could preload them.

[delightdesign]

Hi John, thanks for looking at it, yes ive set up a preload (see below) which totally helps for an immediate and seamless transition in the other browsers...

you may be able to observe what im referring to opening the page www.wowb.co.uk in Chrome, first of all you will see a largely white screen because i haven't figured out how to set a default alternate style, this white screen is the template css on which the styles are based upon, so if you click the bullet points, you'll see it flash to the white between the styles, that flash of white in a usual implementation would be a flash of the default style. i can live with a flash of white only on Chrome, it's figuring out a default alternate style setting which is where im at.

JS file:

var imgArray = [
'/web-design-uk/canvas/web-design-uk.png',
'/web-design-uk/classical/web-design-uk.png',
'/web-design-uk/under-the-sea/web-design-uk.png',
'/web-design-uk/space-and-stars/web-design-uk.png',
'/web-design-uk/creative-one/web-design-uk.png',
'/web-design-uk/earth/web-design-uk.png',

'/web-design-uk/canvas/document.png',
'/web-design-uk/classical/document.png',
'/web-design-uk/earth/background.jpg',
'/web-design-uk/under-the-sea/background.jpg',
'/web-design-uk/space-and-stars/document.png',
'/web-design-uk/creative-one/document.jpg',

'/web-design-uk/canvas/background.jpg',
'/web-design-uk/classical/background.jpg',
'/web-design-uk/under-the-sea/document.png',
'/web-design-uk/space-and-stars/background.jpg',

'/web-design-uk/canvas/home-graphics.png',
'/web-design-uk/under-the-sea/home-graphics.png',
'/web-design-uk/space-and-stars/home-graphics.png',
'/web-design-uk/creative-one/home-graphics.png',

'/web-design-uk/creative-two/web-design-uk.png',
'/web-design-uk/creative-two/document.jpg',

'/web-design-uk/canvas/menu-tabs.png',
'/web-design-uk/canvas/menu-tabs-on.png',
'/web-design-uk/classical/menu-tabs.png',
'/web-design-uk/classical/menu-tabs-on.png',
'/web-design-uk/earth/menu-tabs.png',
'/web-design-uk/earth/menu-tabs-on.png',
'/web-design-uk/creative-one/menu-tabs.png',
'/web-design-uk/creative-one/menu-tabs-on.png',
'/web-design-uk/creative-two/menu-tabs.png',
'/web-design-uk/creative-two/menu-tabs-on.png',

'/web-design-uk/corporate/web-design-uk.png',
'/web-design-uk/corporate/document.png',
'/web-design-uk/corporate/menu-tabs.png',
'/web-design-uk/corporate/menu-tabs-on.png'
];

MM_preloadImages.apply(this, imgArray);

HTML:

<SCRIPT language="javascript">

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

</SCRIPT>



<body onLoad="LoadStyles('/js/styles-code.js');">

[delightdesign]

I believe I've done it. Of course its very simple but I'm happy because any successful JavaScript is a milestone for me.

around line 90 inserting..

else
setStylesheet("corporate") //set default alternate style
}

seems to set a default alternate style.

[designerraghav@gmail.com]

Hi,

I have a font increase/reduce panel in my website, due to the safari 5.1 update it is not working now. can you please check & let me know where is the problem. i am also using the styleswitcher.js since i am very new to JS/JQUERY unable to solve the problem.

http://technosoftcorp.com/it/application_services.htm

appreciate your help on this!

[jscheuer1]

Hi,

I have a font increase/reduce panel in my website, due to the safari 5.1 update it is not working now. can you please check & let me know where is the problem. i am also using the styleswitcher.js since i am very new to JS/JQUERY unable to solve the problem.

http://technosoftcorp.com/it/application_services.htm

appreciate your help on this!

The style switcher script you have bears little resemblance to Dynamic Drive's Style Switcher script other than it's name and its reliance upon enabling/disabling stylesheets, which as we know Safari no longer supports.

You probably didn't know that, but even so - this is an old thread, you should have made a new thread and referred back to this one.

Edit: After working out the below - I just got the Safari 5.1.4 update - it also fixes the problem!

OK, that said, I've made a custom script for you out of my latest version. It tests well in IE 7 +, Opera, Safari, Firefox.

Here's what to do to implement it -

First update to jQuery version 1.7, change:

<script type="text/javascript" src="../resources/js/jquery.min.js"></script>

to:

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>

Next, change this:

<!-- Font Size Options files -->

  <link rel="stylesheet" href="../resources/css/style.css" type="text/css" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/large.css" title="A++" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/medium.css" title="A+" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/small.css" title="A" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/x-small.css" title="A-" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/xx-small.css" title="A--" />  
  <script language="JavaScript1.2" src="../resources/js/styleswitcher.js" type="text/javascript"></script> 
  
<!-- Font Size Options files -->

to:

<!-- Font Size Options files -->

  <link rel="stylesheet" href="../resources/css/style.css" type="text/css" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/large.css" title="A++" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/medium.css" title="A+" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/small.css" title="A" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/x-small.css" title="A-" />
  <link rel="alternate stylesheet" type="text/css" href="../resources/css/xx-small.css" title="A--" />
  <link rel="stylesheet" type="text/css" href="../resources/css/x-small.css" title="addedorreplaced" />
  <script src="../resources/js/jqstyleswitcher.js" type="text/javascript">

  // jqStyleSwitcher Script (c)2012 John Davenport Scheuer
  // as first seen in http://www.dynamicdrive.com/forums/
  // username: jscheuer1 - This Notice Must Remain for Legal Use
  // modified for use by Technosoft corporation's font size changer
  // req. jQuery 1.7 or later
  
  </script>

<!-- End Font Size Options files -->

and put this script (right click and 'save as') in your resources/js/ folder:

Attachment 4403

That's it.

Notes:

If you add or remove alternate stylesheets, that's OK, just make sure to clear the cookie before testing.

The added stylesheet:

  <link rel="stylesheet" type="text/css" href="../resources/css/x-small.css" title="addedorreplaced" />

is the default stylesheet for those with no cookie yet or with no javascript.

Any questions, feel free to ask.

One other thing I noticed working on this, with today's modern screens, the range of font sizes seems skewed too far to the small. But using larger font sizes would require at least parts of the rest of the page be redone at least dimension wise. And all modern browsers have adequate magnify/shrink utilities so this sort of feature on a page isn't really required. Just somethings to think about.