var currentStyleSheet="Default CSS";

function changeFontSize(multiplier)
{ if(document.body)
 { if (document.body.style.fontSize == null || document.body.style.fontSize=="") document.body.style.fontSize = "1.0em";
   document.body.style.fontSize = parseFloat(document.body.style.fontSize) + (multiplier * 0.2) + "em";
   if(parseFloat(document.body.style.fontSize)<.4) document.body.style.fontSize = "0.4em";
   createCookie("usersFontSizePref", document.body.style.fontSize, 365);
 }
}
 
function loadUserDisplayPrefs()
{ var usersFontSize = readCookie("usersFontSizePref");
  if (usersFontSize != null && document.body) document.body.style.fontSize = usersFontSize;
  var usersStyleSheetPref = readCookie("usersStyleSheetPref");
  if (usersStyleSheetPref != null) 
  { changeStyle(usersStyleSheetPref);
  }
}

function setColorSelectorIndexToCurrent()
{ switch(currentStyleSheet)
  { case "White On Black":
      setColorSelectorIndex(1);
      break;    
    case "Black On Yellow": 
      setColorSelectorIndex(2);
      break;
    case "Yellow On Black":  
      setColorSelectorIndex(3);
      break;
    case "Default CSS":
    default:
      currentStyleSheet="Default CSS";
      setColorSelectorIndex(0);
  }
  changeStyle(currentStyleSheet);
}

function setColorSelectorIndex(iv)
{ var colorSelector=document.getElementById('selectColor');
  if (colorSelector != null) colorSelector.selectedIndex = iv;
}

/***********************************************************************************************
 Following two functions are based on the functions found here:
                             Script to swap between stylesheets
  Written by Mark Wilton-Jones, 05/12/2002. v2.2.1 updated 14/03/2006 for dynamic stylesheets
************************************************************************************************

Please see http://www.howtocreate.co.uk/jslibs/ for details and a demo of this script
Please see http://www.howtocreate.co.uk/jslibs/termsOfUse.html for terms of use */

function getAllSheets() 
{ if( !window.ScriptEngine && navigator.__ice_version ) 
  { return document.styleSheets; 
  }
  if( document.getElementsByTagName ) 
  { var Lt = document.getElementsByTagName('link'), St = document.getElementsByTagName('style');
  } 
  else if( document.styleSheets && document.all ) 
  { var Lt = document.all.tags('LINK'), St = document.all.tags('STYLE');
  } 
  else 
  { return []; 
  } 
  for( var x = 0, os = []; Lt[x]; x++ ) 
  { var rel = Lt[x].rel ? Lt[x].rel : Lt[x].getAttribute ? Lt[x].getAttribute('rel') : '';
	if( typeof( rel ) == 'string' && rel.toLowerCase().indexOf('style') + 1 ) 
	{ os[os.length] = Lt[x]; 
	}
  } 
  for( var x = 0; St[x]; x++ ) 
  { os[os.length] = St[x]; 
  } 
  return os;
}

function changeStyle(upss) 
{ for( var x = 0, ss = getAllSheets(); ss[x]; x++ ) 
  { if(ss[x].title != "Main CSS") ss[x].disabled = true;
    if( ss[x].title == upss) 
    { ss[x].disabled = false; 
    }
  } 
  currentStyleSheet = upss;
  createCookie("usersStyleSheetPref", upss, 365);
}

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 var 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;
}

/* --------------------------- toggle menu ---------------------------------- */
var toggleMenu = {
	init : function(sContainerClass, sHiddenClass) {
		if (!document.getElementById || !document.createTextNode) {return;} // Check for DOM support
		var arrMenus = this.getElementsByClassName(document, 'ul', sContainerClass);
		var arrSubMenus, oSubMenu, oLink;
		for (var i = 0; i < arrMenus.length; i++) {
			arrSubMenus = arrMenus[i].getElementsByTagName('ul');
			for (var j = 0; j < arrSubMenus.length; j++) {
				oSubMenu = arrSubMenus[j];
				oLink = oSubMenu.parentNode.getElementsByTagName('a')[0];
				oLink.onclick = function(){toggleMenu.toggle(this.parentNode.getElementsByTagName('ul')[0], sHiddenClass); return false;}
				this.toggle(oSubMenu, sHiddenClass);
			}
		}
	},
	toggle : function(el, sHiddenClass) {
		var oRegExp = new RegExp("(^|\\s)" + sHiddenClass + "(\\s|$)");
		el.className = (oRegExp.test(el.className)) ? el.className.replace(oRegExp, '') : el.className + ' ' + sHiddenClass; // Add or remove the class name that hides the element
	},
/* addEvent function from http://www.quirksmode.org/blog/archives/2005/10/_and_the_winner_1.html */
	addEvent : function(obj, type, fn) {
		if (obj.addEventListener)
			obj.addEventListener(type, fn, false);
		else if (obj.attachEvent) {
			obj["e"+type+fn] = fn;
			obj[type+fn] = function() {obj["e"+type+fn](window.event);}
			obj.attachEvent("on"+type, obj[type+fn]);
		}
	},
/*
Written by Jonathan Snook, http://www.snook.ca/jonathan
Add-ons by Robert Nyman, http://www.robertnyman.com
*/
	getElementsByClassName : function(oElm, strTagName, strClassName){
	    var arrElements = (strTagName == "*" && document.all)? document.all : oElm.getElementsByTagName(strTagName);
	    var arrReturnElements = new Array();
	    strClassName = strClassName.replace(/\-/g, "\\-");
	    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	    var oElement;
	    for(var i=0; i<arrElements.length; i++){
	        oElement = arrElements[i];
	        if(oRegExp.test(oElement.className)){
	            arrReturnElements.push(oElement);
	        }
	    }
	    return (arrReturnElements)
	}
};
toggleMenu.addEvent(window, 'load', function(){toggleMenu.init('menu','hidden');});