var baseFontSize = 0.75;
var minFontSize = 0.55;
var maxFontSize = 1.35;
var textsize = baseFontSize;
var baseFontUnit = "em";

function changetextsize(up)
{
	if(up)
	{
		textsize = parseFloat(textsize) + parseFloat(".20");
	}
	else
	{
		textsize = parseFloat(textsize) - parseFloat(".20");
	}

	textsize = textsize.toFixed(2);

	fsize(textsize, baseFontUnit, 'content');
}

function fsize(size,unit,id)
{
	/*var vfontsize = document.getElementById(id);

	if(vfontsize)
	{
		vfontsize.style.fontSize = size + unit;
		createCookie("textsizestyle", textsize, 365);
	}*/

	if (document.body.style.fontSize == "") 
	{
		document.body.style.fontSize = textsize + baseFontUnit;
	}
	else
	{
		document.body.style.fontSize = parseFloat(size) + unit;
	}

	createCookie("textsizestyle", textsize, 365);
	
	if (textsize <= minFontSize)
	{
		(document.getElementById("fontSizeDecrease")).style.visibility = "hidden";
	}
	if (textsize >= maxFontSize)
	{
		(document.getElementById("fontSizeIncrease")).style.visibility = "hidden";
	}

	if (textsize > minFontSize && textsize < maxFontSize)
	{
		(document.getElementById("fontSizeDecrease")).style.visibility = "visible";
		(document.getElementById("fontSizeIncrease")).style.visibility = "visible";
	}
}

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;
}