function swapImgRestore() { //v3.0
	var i,x,a=document.sr; 
	for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

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

function findObj(n, d) { //v4.0
	var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);
	}
	if(!(x=d[n])&&d.all) x=d.all[n]; 
	for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
	if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function swapImage() { //v3.0
	var i,j=0,x,a=swapImage.arguments; document.sr=new Array; for(i=0;i<(a.length-2);i+=3)
	if ((x=findObj(a[i]))!=null){document.sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function openBrWindow(theURL,winName,features) { //v2.0

	window.open(theURL,winName,features);

}

function closeWindow() {
	if (typeof(popupWin) != "undefined"){
		if (popupWin.closed == false) {
			popupWin.close();
		}
	}
}

//	CALL A POPUP WINDOW
function showWindow (url, name, w, h, scroll, resize) {
	var winX = 0;
	var winY = 0;
	var popupWin;
	if (parseInt(navigator.appVersion)>=4) {
		winX = (screen.availWidth - w)*0.5;
		winY = (screen.availHeight - h)*0.5;
	}
	popupWin = window.open(url, name, 'width=' + w + ',height=' + h + ',left=' + winX + ',top=' + winY + ',scrollbars=' + scroll + ',resizable=' + resize);
	popupWin.focus();
	return false;
}

// OPEN A PAGE WITH RANDOM CSS
function pickRandomCSS() {
	var arrayCSS = ["ds_stars", "ds_startree"];
	var cssNum = Math.floor( Math.random() * arrayCSS.length);
	var thisCSS = arrayCSS[cssNum];
	document.write('<style type="text/css" media="all">@import url(css/' + thisCSS + '.css);</style>');
}

//	SHOW THE STYLESWITCHER BUTTON
function showStyleswitcher(pagestyle) {
	var theImageSource = "images/btn_switch" + pagestyle + ".gif";
	document.write('<a href="#" id="switchOriginal" title="Switch to the original stylesheet"');
	document.write(' onclick="setActiveStyleSheet(\'\'); return false;">');      // onkeypress="setActiveStyleSheet(\'\', 1); return false;">');
	document.write(' <img src=' + theImageSource + ' class="icon" alt="Switch layout" height="15" width="80" /></a>');
	document.write(' <a href="#" id="switchAlternate" title="Switch to the alternate stylesheet"');
	document.write(' onclick="setActiveStyleSheet(\'alternate\'); return false;">');     //onkeypress="setActiveStyleSheet(\'alternate\', 1);return false;">'); 
	document.write(' <img src=' + theImageSource + ' class="icon" alt="Switch layout" height="15" width="80" /></a>');
}

// SWITCH STYLES
// http://www.alistapart.com/stories/alternate/

function setActiveStyleSheet(title) {
  var i, a, main;
  for (i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if (a.getAttribute("rel") &&
        a.getAttribute("rel").indexOf("style") != -1 &&
        a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for (i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if (a.getAttribute("rel") &&
        a.getAttribute("rel").indexOf("style") != -1 &&
        a.getAttribute("title") &&
        !a.disabled
        ) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for (i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if (a.getAttribute("rel") &&
        a.getAttribute("rel").indexOf("style") != -1 &&
        a.getAttribute("rel").indexOf("alt") == -1 &&
        a.getAttribute("title")
        ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);