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

window.onload=function(){
  var formref=document.getElementById("switchform");
  //indicateSelected(formref.choice)
}

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) {
  var i, cacheobj
  for(i=0; (cacheobj=document.getElementsByTagName("link")[i]); i++) {
     if(cacheobj.getAttribute("rel").indexOf("style") != -1 && cacheobj.getAttribute("title")) {
        cacheobj.disabled = true
        if(cacheobj.getAttribute("title") == title)
           cacheobj.disabled = false //enable chosen style sheet
     }
  }
}

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
         }
      }
   }
}

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