//---thanks to alistapart
//-----------------------------------------------------------------------------rerender
function rerender (x) {
w = 100 - 0.0001* (x);
document.getElementById ('header').style.width = w + '%';
// alert("ReRender: " + document.getElementById ("bodyCSS").href);
}
//-----------------------------------------------------------------------------cookie functions
function createCookie(name,value) {
  document.cookie = name+"="+value+"; 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 = cssFileName + '.css';
//alert (href);
   document.getElementById ("bodyCSS").href = href;
   createCookie("style", cssFileName);
   return null;
}
//-----------------------------------------------------------------------------getActiveStyleSheet
function getActiveStyleSheet() {
   href = document.getElementById ("bodyCSS").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;
}
//-----------------------------------------------------------------------------changeFontSize
//If in publish mode, output page names
//If in preview or smart edit mode, output RDTemp file names
function changeFontSize (fontSize) {
  switch (fontSize)
     {

             
                      case 1 : setActiveStyleSheet('capricorn.fontsize.small'); break;
                      case 2 : setActiveStyleSheet('capricorn.fontsize.default'); break;
                      case 3 : setActiveStyleSheet('capricorn.fontsize.large'); break;
                    

     }
  rerender (fontSize);
}
//-----------------------------------------------------------------------------displayFontSizeButtons
// buttons are displayed only when javascript is enabled.
function displayFontSizeButtons() {
li=document.getElementById('fontChanger');
li.innerHTML = '<a href="javascript:changeFontSize(1)">' +
'<img src="http://www.rnib.org.uk/xpedio/images/RNIBInternetLook/smallA.gif" alt="small text" /></a></li><li>' +
'<a href="javascript:changeFontSize(2)">' +
'<img src="http://www.rnib.org.uk/xpedio/images/RNIBInternetLook/mediumA.gif" alt="medium text" /></a></li><li>' +
'<a href="javascript:changeFontSize(3)">' +
'<img src="http://www.rnib.org.uk/xpedio/images/RNIBInternetLook/largeA.gif" alt="large text" /></a></li></ul>';
}

//-----------------------------------------------------------------------------onLoad
function fontSize_OnLoad(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getActiveStyleSheet ();
  if (cookie != null) { setActiveStyleSheet(title); } 
  rerender (4);
}

function fontSize_OnUnLoad(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title);
}
// These load and unload events are called from the page footer