//---thanks to alistapart
//-----------------------------------------------------------------------------rerender
/*function rerender (x) {
w = 100 - 0.0001* (x);
//document.getElementById ('header').style.width = w + '%';
}*/
//-----------------------------------------------------------------------------cookie functions
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;
}
//-----------------------------------------------------------------------------setActiveStyleSheet
function setActiveStyleSheet (cssFileName) {
   href = '/templates/default/css/system/' + cssFileName + '.css';
//alert (href);
   document.getElementById ("Template_contrast").href = href;
//alert ("done");
   return null;
}
//-----------------------------------------------------------------------------getActiveStyleSheet
function getActiveStyleSheet() {
   var obj = document.getElementById ("Template_contrast") ;
   var cssFileName = "" ;
   
   if ( null != obj ) {
       href = obj.href;
       x = href.lastIndexOf('/') + 1;
       y = href.lastIndexOf('.')
       cssFileName = href.substring(x, y);
   }
//alert ('cssFileName = ' + cssFileName);

   return cssFileName;
}
//-----------------------------------------------------------------------------getPreferredStyleSheet
function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}
//-----------------------------------------------------------------------------changeContrast
function changeContrast (caseNumber) {
  switch (caseNumber)
     {
      case 1 : setActiveStyleSheet('normal-contrast'); displayHighContrastLink(); break;
      case 2 : setActiveStyleSheet('high-contrast'); displayNormalContrastLink();break;
     }
  rerender (caseNumber);
}
//-----------------------------------------------------------------------------displayFontSizeButtons
// buttons are displayed only when javascript is enabled.
function displayHighContrastLink(){
	li=document.getElementById('contrastLink');
	li.innerHTML = '<a href="javascript:changeContrast(2)" title="Use this link to view the high contrast site">High contrast view</a>';
	$(".sIFR-alternate-disabled").removeClass("sIFR-alternate-disabled").addClass("sIFR-alternate");
}
function displayNormalContrastLink(){
	li=document.getElementById('contrastLink');
	li.innerHTML = '<a href="javascript:changeContrast(1)" title="Use this link to view the normal contrast site">Normal contrast view</a>'
	$(".sIFR-alternate").removeClass("sIFR-alternate").addClass("sIFR-alternate-disabled");
}
//-----------------------------------------------------------------------------onLoad
if (document.addEventListener) {
  //doc is loaded twice!?!? 
  //document.addEventListener("DOMContentLoaded", init, false);
}
function init(e) {
  var cookie = readCookie("style");
  //alert(" - init - 1");
 var title = cookie ? cookie : getActiveStyleSheet ();
  if (cookie != null) {
	//alert(" - init - 2");
	setActiveStyleSheet(title);
	//alert(" - init - 3");
  	if (title == "normal-contrast"){
 		//alert(" - init - 31");
		displayHighContrastLink(); 	
  	}else{
  		//alert(" - init - 32");
		displayNormalContrastLink();
		//alert(" - init - 42");
 	 }
  }else{
  		//alert(" - init - 33");
		displayHighContrastLink();
		//alert(" - init - 43");
  }
  //rerender(4);
}

window.onload = init;/*works for IE and FF and Safari*/
window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 0);
}