var textsize = 12;
var contentFSize = 12;
var menuFSize = 12;
var otherFSize = 12;
var otherFSize2 = 12;

function changetextsize(up){
	if(up){
		if (textsize<15) {
		textsize = parseFloat(textsize)+2;
		}
	}else{
		textsize =parseFloat(textsize)-2;
	}
}

function fsize(size,unit,id){
	var vfontsize = document.getElementById(id);
	if(vfontsize){
		vfontsize.style.fontSize = size + unit;
		createCookie("textsizestyle", textsize, 365);
	}
}

function changeFontSize(v1,v2,v3){
	contentFSize = parseFloat(v1);
	menuFSize = parseFloat(v2);
	otherFSize = parseFloat(v3);
	otherFSize2 = parseFloat(v3);
}

function fontSize(size1,size2,size3,unit){
	var vContentFSize = document.getElementById('content');
	var vMenuFSize = document.getElementById('navbar');
	var vOtherFSize = document.getElementById('niushome');
	var vOtherFSize2 = document.getElementById('e_cause');


	if(vContentFSize){
		vContentFSize.style.fontSize = size1 + unit;
		createCookie("contentFSize", contentFSize, 365);
	}

	if(vMenuFSize){
		vMenuFSize.style.fontSize = size2 + unit;
		createCookie("menuFSize", menuFSize, 365);
	}

	if(vOtherFSize){
		vOtherFSize.style.fontSize = size3 + unit;
		createCookie("otherFSize", otherFSize, 365);
	}
	if(vOtherFSize2){
		vOtherFSize2.style.fontSize = (size3) + unit;
	}
}

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 var 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;
}