/*-------------------------------------------------------------------
Accessibility Toolbar
---------------------------------------------------------------------*/

//Start config-----------------------------------------------------------------------------------------------
var atb_content 					= "head_space_top";	//ID of page element containing toolbar
var atb_debug_element_id			= "debug"; 			//Element to display begugging info. If it does not exist it will be created dynamically 

//fontSize config
var atb_fontsize_debug 				= false;			//Display debugging information on setting font size
var atb_fontsize_applyto 			= "container";		//ID of page element holding content
var atb_fontsize_cookiename 		= "fontSize_anita";		//Cookie name under which to store font size
var atb_fontsize_cookielifetime 	= 365;				//Lifetime (days) of above cookie
var atb_fontsize_default 			= 1.0;				//Default font size in em
var atb_fontsize_max 				= 1.6;				//Maximum size allowed in em
var atb_fontsize_min 				= 0.8;				//Minimim size allowed in em

//PageStyle config
var atb_pagestyle_cookiename 		= "pageStyle_anita";		//Cookie name under which to store page style
var atb_pagestyle_cookielifetime 	= 365;				//Lifetime (days) of above cookie
var atb_pagestyle_linkprefix		= "lnkPageStyle_"	//Switcher link ID prefix
var atb_pagestyle_link_activeclass	= "hlite"			//CSS class to be applied to the active style sheet link
//End config-------------------------------------------------------------------------------------------------

/*-------------------------------------------------------------------
Cookie functions
Code by Paul Sowden. 
http://www.alistapart.com/stories/alternate/
---------------------------------------------------------------------*/
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;
}


var min=6;
var max=20;

function increaseFontSize() {

	var p = document.getElementsByTagName('p');

	increaseFontSize_element(p)
	
	p = document.getElementsByTagName('li');
	increaseFontSize_element(p)
	p = document.getElementsByTagName('div');
	increaseFontSize_element(p)
	p = document.getElementsByTagName('a');
	increaseFontSize_element(p)

}

function increaseFontSize_element(p) {
   
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=max) {
         s += 1;
      }
      p[i].style.fontSize = s+"px"
   }
}

function decreaseFontSize() {

	var p = document.getElementsByTagName('p' );

	decreaseFontSize_element(p);
	
	p = document.getElementsByTagName('li');
	decreaseFontSize_element(p);
	p = document.getElementsByTagName('div');
	decreaseFontSize_element(p);
	p = document.getElementsByTagName('a');
	decreaseFontSize_element(p);

}

function decreaseFontSize_element(p) {
	//alert("decrese");
   
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 12;
      }
      if(s!=min) {
         s -= 1;
      }
      p[i].style.fontSize = s+"px"
   }   
}

function resetFontSize() {

	var p = document.getElementsByTagName('p' );

	resetFontSize_element(p)
	
	p = document.getElementsByTagName('li');
	resetFontSize_element(p);
	p = document.getElementsByTagName('div');
	resetFontSize_element(p);
	p = document.getElementsByTagName('a');
	resetFontSize_element(p);

}


function resetFontSize_element(p) {
  
   for(i=0;i<p.length;i++)
   {  
      var s = 12;
      p[i].style.fontSize = s+"px"
   }   
}

/*-------------------------------------------------------------------
Style Switcher Functions
Code by Paul Sowden. 
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").indexOf("style") != -1 && a.getAttribute("title")) {
			a.disabled = true;
			//if (document.getElementById(atb_pagestyle_linkprefix + a.getAttribute("title"))) {
			//	document.getElementById(atb_pagestyle_linkprefix + a.getAttribute("title")).className = null;
			//}
			if(a.getAttribute("title") == title) {
				a.disabled = false;
				//if (document.getElementById(atb_pagestyle_linkprefix + a.getAttribute("title"))) {
				//	document.getElementById(atb_pagestyle_linkprefix + a.getAttribute("title")).className = atb_pagestyle_link_activeclass;
				//}
				createCookie(atb_pagestyle_cookiename, title, atb_pagestyle_cookielifetime);
			}
		}
	}
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(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").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}
/*-------------------------------------------------------------------
Event Handling
---------------------------------------------------------------------*/
function addLoadHandler(h){
	if(h) {
		if(!document.loadHandlers) {
			document.loadHandlers = new Array();
			document.loadHandlers[0] = h;
			document.lastLoadHandler = 0;
		}
		else {
			document.lastLoadHandler++;
			document.loadHandlers[document.lastLoadHandler] = h;
		}
	}
}

function initLoadEvents() {
	var l=document.lastLoadHandler;
	document.lastLoadHandler = -1;
	for(var i=0; i<=l; i++) {
		var h = document.loadHandlers[i];
		if(typeof(h)!='function') {
			var bPar = (h.indexOf('(')==-1);
			eval(h+(bPar ? '();' : ';'));
		}
		else {
			h();
		}
	}
}


/*-------------------------------------------------------------------
Code entry point
---------------------------------------------------------------------*/

addLoadHandler(
	function(e) {
		var cookie = readCookie(atb_pagestyle_cookiename);
		var title = cookie ? cookie : getPreferredStyleSheet();
		setActiveStyleSheet(title);
	}
);

//addLoadHandler(fontResizeBy(0));

/*addLoadHandler(
	function(e) {
		document.getElementById(atb_content).style.display = "block";
	}
);*/

addLoadHandler(window.onload);
window.onload = initLoadEvents;