var fontSlider;
var fontSlider2;
var changeOtherSlider = false;
var scrollTopPosition;

Event.observe(window, 'load', function() {
	//initSize = getFontSize();
	initSize = initFontSize();
	fontSlider = new Control.Slider('handle1','track1',{
		range: $R(12, 20),
		values: [12,13,14,15,16,18,19,20],
		//values: [10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],
		sliderValue: initSize,
		onSlide:function(v){
		//$('content').setStyle({ fontSize: v });
		//f = v + 'pt';
		//$('content').setStyle({ fontSize: f });
		},
		onChange:function(v){
		//$('debug1').innerHTML='changed! '+v;
		f = v + 'pt';
		Set_Cookie('fontSize', v, 3, '/', '', '');
		$('c-body').setStyle({ fontSize: f });
		if(!changeOtherSlider) {
			changeOtherSlider = true;
			fontSlider2.setValue(32 - v);
		} else {
			changeOtherSlider = false;
		}
		}
	});

	fontSlider2 = new Control.Slider('handle2','track2',{
		axis:'vertical',
		range: $R(12, 20),
		values: [12,13,14,15,16,18,19,20],
		//values: [10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],
		sliderValue: 32-initSize,
		onSlide:function(v){
		//$('content').setStyle({ fontSize: v });
		//f = v + 'pt';
		//$('content').setStyle({ fontSize: f });
		},
		onChange:function(v){
		//$('debug1').innerHTML='changed! '+v;
		v = 32 - v;
		f = v + 'pt';
		Set_Cookie('fontSize', v, 3, '/', '', '');
		$('c-body').setStyle({ fontSize: f });
		if(!changeOtherSlider) {
			changeOtherSlider = true;		
			fontSlider.setValue(v);
		} else {
			changeOtherSlider = false;
		}
		}
	
	});
	/*
	if(Get_Cookie('fontSize')) {
		initSize = Get_Cookie('fontSize');
		_setFontSize(initSize);
	}
	*/ 
	window.onscroll = fix_slider;
	var corner = document.getElementsByTagName('body')[0].getAttribute('title');
	if(corner == 'doctor') {
		scrollTopPosition = 640;
	} else {
		scrollTopPosition = 580;
	}
	
});


function fix_slider() {
	var slider = document.getElementById('slider2');
	var screen_top = document.body.scrollTop;
	var slider_position = screen_top + scrollTopPosition;
	slider.style.top = slider_position + "px";
	}
function initFontSize() {
	if(Get_Cookie('fontSize')) {
        maintain = Get_Cookie('fontSize');
        _setFontSize(maintain);
        return maintain;
	} else {
		return getFontSize();
	}
}

function setFontSize(param) {
	prevSize = getFontSize();
	if(param == '+') {
		fontSize = parseInt(Math.ceil(prevSize + 1));
	} else if(param == '-') {
		fontSize = parseInt(Math.floor(prevSize - 1));
	}
	//¹«ÇÑ´ë·Î ÀÛ¾ÆÁö´Â°ÍÀÇ ÀӽùæÁö
	if(fontSize < 12 || fontSize > 20) {
		return false;
	}
	fontSlider.setValue(fontSize);
	fontSlider2.setValue(32 - fontSize);
	_setFontSize(fontSize);
	Set_Cookie('fontSize', fontSize, 3, '/', '', '');
}

function _setFontSize(num) {
	num = num + 'pt';
	$('c-body').setStyle({ fontSize: num });
}

function getFontSize() {
	var ret = $('c-body').getStyle('fontSize');
	if(/px$/.match(ret)) {
		m = /([\d\.]*)px$/.exec(ret);
		m = parseFloat(m[1]) * 0.75;
	} else if(/pt$/.match(ret)) {
		m = /(\d*)pt$/.exec(ret);
		m = parseFloat(m[1]);
	} else {
		m = parseFloat(ret);
	}
	return m;
}

function Set_Cookie( name, value, expires, path, domain, secure ) 
{
// set time, it's in milliseconds
var today = new Date();
today.setTime( today.getTime() );

/*
if the expires variable is set, make the correct 
expires time, the current script below will set 
it for x number of days, to make it for hours, 
delete * 24, for minutes, delete * 60 * 24
*/
if ( expires )
{
expires = expires * 1000 * 60 * 60 * 24;
}
var expires_date = new Date( today.getTime() + (expires) );

document.cookie = name + "=" +escape( value ) +
( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + 
( ( path ) ? ";path=" + path : "" ) + 
( ( domain ) ? ";domain=" + domain : "" ) +
( ( secure ) ? ";secure" : "" );
}
	
// this fixes an issue with the old method, ambiguous values 
// with this test document.cookie.indexOf( name + "=" );
function Get_Cookie( check_name ) {
	// first we'll split this cookie up into name/value pairs
	// note: document.cookie only returns name=value, not the other components
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false; // set boolean t/f default f
	
	for ( i = 0; i < a_all_cookies.length; i++ )
	{
		// now we'll split apart each name=value pair
		a_temp_cookie = a_all_cookies[i].split( '=' );
		
		
		// and trim left/right whitespace while we're at it
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');
	
		// if the extracted name matches passed check_name
		if ( cookie_name == check_name )
		{
			b_cookie_found = true;
			// we need to handle case where cookie has no value but exists (no = sign, that is):
			if ( a_temp_cookie.length > 1 )
			{
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}
			// note that in cases where cookie is initialized but no value, null is returned
			return cookie_value;
			break;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}
	if ( !b_cookie_found )
	{
		return null;
	}
}