// JavaScript Document
var min = 8;
var max = 18;

function setCookie(c_name, value, expiredays) {
	var exdate = new Date();
	exdate.setDate(exdate.getDate() + expiredays);
	document.cookie = c_name + "=" + escape(value)
			+ ((expiredays == null) ? "" : ";expires=" + exdate.toUTCString());
}

function getCookie(c_name) {
	if (document.cookie.length > 0) {
		c_start = document.cookie.indexOf(c_name + "=");
		if (c_start != -1) {
			c_start = c_start + c_name.length + 1;
			c_end = document.cookie.indexOf(";", c_start);
			if (c_end == -1)
				c_end = document.cookie.length;
			return unescape(document.cookie.substring(c_start, c_end));
		}
	}
	return "";
}

function increaseFontSize() {
	try {
		var p = document.getElementById('content-text').getElementsByTagName('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;
				setCookie('dartFontSize', s, 7);
			}
			p[i].style.fontSize = s + "px"
		}
	}
	catch (err) {
		
	}
}

function decreaseFontSize() {
	try{
		var p = document.getElementById('content-text').getElementsByTagName('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 != min) {
				s -= 1;
				setCookie('dartFontSize', s, 7);
			}
			p[i].style.fontSize = s + "px"
		}
	}
	catch (err) {
		
	}
}


function checkFontSize(){
	try{
		var c = getCookie('dartFontSize');
		if (c!=null && c!=""){
			var p = document.getElementById('content-text').getElementsByTagName('p');
			for (i = 0; i < p.length; i++) {
				p[i].style.fontSize = c + "px";
			}
		}
	}
	catch (err) {
		
	}
}