var cookiePageWidth = 'cookiePageWidth', cookieLetterSize = 'cookieLetterSize';
var curLetterSize, coeff = 1000;

var minLetterSize = '0.7em';	// can be changed (only in em)
var norLetterSize = '1em';
var maxLetterSize = '1.3em';	// can be changed (only in em)
var letterStep = 0.1;			// can be changed (step of letters size change only in em)

var minPageWidth = '920px';		// can be changed (only in px)
var norPageWidth = '1100px';	// can be changed (only in px)
var maxPageWidth = '98%';		// can be changed (only in %)

if (readCookie(cookiePageWidth) == null)
{
	createCookie(cookiePageWidth, minPageWidth, 1);
}

if (readCookie(cookieLetterSize) == null)
{
	createCookie(cookieLetterSize, norLetterSize, 1);
}

function hideAll()
{
	$("#small").empty();	$("#small").append(' ');
	$("#normal").empty();	$("#normal").append(' ');
	$("#large").empty();	$("#large").append(' ');

	$("#w800").empty();		$("#w800").append(' ');
	$("#w1024").empty();	$("#w1024").append(' ');
	$("#wLiquid").empty();	$("#wLiquid").append(' ');
}

function setCurrentStatus()
{
	hideAll();

	if (readCookie(cookieLetterSize) == minLetterSize)
	{
		$("#small").empty();
		$("#small").append('<div id="dsmall">&nbsp;</div>');
	}
	else if (readCookie(cookieLetterSize) == norLetterSize)
	{
		$("#normal").empty();
		$("#normal").append('<div id="dnormal">&nbsp;</div>');
	}
	else if (readCookie(cookieLetterSize) == maxLetterSize)
	{
		$("#large").empty();
		$("#large").append('<div id="dlarge">&nbsp;</div>');
	}

	if (readCookie(cookiePageWidth) == minPageWidth)
	{
		$("#w800").empty();
		$("#w800").append('<div id="dw800">&nbsp;</div>');
	}
	else if (readCookie(cookiePageWidth) == norPageWidth)
	{
		$("#w1024").empty();
		$("#w1024").append('<div id="dw1024">&nbsp;</div>');
	}
	else if (readCookie(cookiePageWidth) == maxPageWidth)
	{
		$("#wLiquid").empty();
		$("#wLiquid").append('<div id="dwLiquid">&nbsp;</div>');
	}
}

setCurrentStatus();

$("#w800").click(function() {
	var w = readCookie(cookiePageWidth);
	if (maxPageWidth == w)
	{
		w = document.body.clientWidth;
		w = w * parseInt(maxPageWidth) / 100;
		$('div.page').css('width', w + 'px');
	}
	createCookie(cookiePageWidth, minPageWidth, 1);
	$("div.page").animate({
		width: parseInt(minPageWidth)
	}, "slow");
	setCurrentStatus();
});

$("#w1024").click(function() {
	var w = readCookie(cookiePageWidth);
	if (maxPageWidth == w)
	{
		w = document.body.clientWidth;
		w = w * parseInt(maxPageWidth) / 100;
		$('div.page').css('width', w + 'px');
	}
	$("div.page").animate({
		width: parseInt(norPageWidth)
	}, "slow");
	createCookie(cookiePageWidth, norPageWidth, 1);
	setCurrentStatus();
});

$("#wLiquid").click(function() {
	if (maxPageWidth != readCookie(cookiePageWidth))
	{
		var w = document.body.clientWidth;
		w = w * parseInt(maxPageWidth) / 100;
		$("div.page").animate({
			width: w
		}, "slow");
	}
	createCookie(cookiePageWidth, maxPageWidth, 1);
	setCurrentStatus();
});

$("#small").click(function() {
	curLetterSize = parseFloat(readCookie(cookieLetterSize)) * coeff - letterStep * coeff;
	curLetterSize /= coeff;
	if (curLetterSize < parseFloat(minLetterSize))
	{
		curLetterSize = parseFloat(minLetterSize);
	}
	$("div.page").css({ fontSize: curLetterSize + 'em' });
	createCookie(cookieLetterSize, curLetterSize + 'em', 1);
	setCurrentStatus();
});
$("#normal").click(function() {
	$("div.page").css({ fontSize: norLetterSize });
	createCookie(cookieLetterSize, norLetterSize, 1);
	setCurrentStatus();
});
$("#large").click(function() {
	curLetterSize = parseFloat(readCookie(cookieLetterSize)) * coeff + letterStep * coeff;
	curLetterSize /= coeff;
	if (curLetterSize > parseFloat(maxLetterSize))
	{
		curLetterSize = parseFloat(maxLetterSize);
	}
	$("div.page").css({ fontSize: curLetterSize + 'em' });
	createCookie(cookieLetterSize, curLetterSize + 'em', 1);
	setCurrentStatus();
});
$(window).resize(function() {
	if (maxPageWidth == readCookie(cookiePageWidth))
	{
		$("div.page").css("width", readCookie(cookiePageWidth));
	}
});

$("div.page").css("width", readCookie(cookiePageWidth));
$("div.page").css("fontSize", readCookie(cookieLetterSize));