https://saltarbutartzi.org.il/Scripts/doctextsizer.js

1//Document Text Resizer script (May 14th, 08'): By JavaScript Kit: http://www.javascriptkit.com
2
3var documenttextsizer={
4
5prevcontrol: '', //remember last control clicked on/ selected
6existingclasses: '',
7
8setpageclass:function(control, newclass){
9	if (this.prevcontrol!='')
10			this.css(this.prevcontrol, 'selectedtoggler', 'remove') //de-select previous control, by removing 'selectedtoggler' from it
11	document.documentElement.className=this.existingclasses+' '+newclass //apply new class to document
12	this.css(control, 'selectedtoggler', 'add') //select current control
13	this.setCookie('pagesetting', newclass, 5) //remember new class added to document for 5 days
14	this.prevcontrol=control
15},
16
17css:function(el, targetclass, action){
18	var needle=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "ig")
19	if (action=="check")
20		return needle.test(el.className)
21	else if (action=="remove")
22		el.className=el.className.replace(needle, "")
23	else if (action=="add")
24		el.className+=" "+targetclass
25},
26
27getCookie:function(Name){ 
28	var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
29	if (document.cookie.match(re)) //if cookie found
30		return document.cookie.match(re)[0].split("=")[1] //return its value
31	return null
32},
33
34setCookie:function(name, value, days){
35	if (typeof days!="undefined"){ //if set persistent cookie
36		var expireDate = new Date()
37		var expstring=expireDate.setDate(expireDate.getDate()+days)
38		document.cookie = name+"="+value+"; path=/; expires="+expireDate.toGMTString()
39	}
40	else //else if this is a session only cookie
41		document.cookie = name+"="+value
42},
43
44setup:function(targetclass){
45	this.existingclasses=document.documentElement.className //store existing CSS classes on HTML element, if any
46	var persistedsetting=this.getCookie('pagesetting')
47	var alllinks=document.getElementsByTagName("a")
48	for (var i=0; i<alllinks.length; i++){
49		if (this.css(alllinks[i], targetclass, "check")){
50			if (alllinks[i].getAttribute("rel")==persistedsetting) //if this control's rel attribute matches persisted doc CSS class name
51				this.setpageclass(alllinks[i], alllinks[i].getAttribute("rel")) //apply persisted class to document
52			alllinks[i].onclick=function(){
53				documenttextsizer.setpageclass(this, this.getAttribute("rel"))
54				return false
55			}
56		}
57	}
58}
59
60}