//Style Sheet Switcher version 1.0 Nov 9th, 2005
//Author: Dynamic Drive: http://www.dynamicdrive.com
//Usage terms: http://www.dynamicdrive.com/notice.htm

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) {  
//this is a modification of the original script, which swapped the external stylesheet. For some reason
//the stylesheet exchange disabled the CSS based navigational popups from working in Navigator v6.0. This
//implementation simply changes the text sizes in the div with the id = "content".

//can also give the bodytag an ID, and capture it with 'var wanted_tag=document.getElementById("bodyid");' instead
//of using getElementsByTagName. Note that wanted_tag would then be a scalar, not an array as below.

var wanted_id=document.getElementById("content");   
 if(wanted_id)
  {if (title=="medium") wanted_id.style.fontSize="14px";
   else if (title=="large") wanted_id.style.fontSize="16px";
   else wanted_id.style.fontSize="12px";
  }
}

function chooseStyle(styletitle, days){
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 
var i
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 (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
}
}
}
}

function initStyle(){
var selectedtitle=getCookie("mysheet")
if (document.getElementById && selectedtitle!=null) //load user chosen style sheet if there is one stored
setStylesheet(selectedtitle)
}