// JavaScript Document
// Increase Decrease text size using additional style sheets

function lrgTxt() {
    var ActiceSS;
	ActiceSS = getActiveStyleSheet();
	if (ActiceSS == null)
	{
	setActiveStyleSheet("style_large");
	return;
	}
	 
	if (ActiceSS == "style_small")
	{
	setActiveStyleSheet("standard");
	}
	if (ActiceSS == "style_large")
	{
	alert("Large text size is already selected.\nToo make further changes, please use your browser menu settings.");
	}
	}  

function smlTxt() {
	var ActiceSS;
	ActiceSS = getActiveStyleSheet();
	if (ActiceSS == null)
	{
	setActiveStyleSheet("style_small");
	return;
	}
	  
	if (ActiceSS == "style_large")
	{
	setActiveStyleSheet("standard");
	} 
	if (ActiceSS == "style_small")
	{
	alert("Small text size is already selected.\nToo make further changes, please use your browser menu settings.");
	} 
	}

function setDefaultStyleSheet(title) {
	var cookie = readCookie("style");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
	}

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(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").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;
	}

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();
	if (title == "printer")
	{  
	return true;
	} 
	else 
	{  
	
	createCookie("style", title, 365);
	}
	}

// toggle visibility 

function toggle( targetId ){
	if (document.getElementById){
	target = document.getElementById( targetId );
	if (target.style.display == "none"){
	target.style.display = "";
	} else {
	target.style.display = "none";
	}
	}
	}