function setCookie(nom,valeur,jours) {
    var expDate = new Date();
    expDate.setTime(expDate.getTime() + (jours * 24 * 3600 * 1000));
    document.cookie = nom + "=" + escape(valeur) + ";expires=" + expDate.toGMTString();
}

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;
}


function changeFontSize(size) {
	document.getElementById(currentSize).style.color = "#878787";
	currentSize = size;
	switch (size) {
		case "txtSize_small" :
			//document.getElementsByTagName("body")[0].style.fontSize = "1em";
			
			$("div.title").css('font-size', '1.4em');
			$("div.subtitle").css('font-size', '1.2em');
			
			$("p").css('font-size', '1.1em');
			
			
			break;
		case "txtSize_medium" :
			//document.getElementsByTagName("body")[0].style.fontSize = "1.1em";
			$("div.title").css('font-size', '1.8em');
			$("div.subtitle").css('font-size', '1.4em');
			
			$("p").css('font-size', '1.3em');
			
			
			break;
		case "txtSize_large" :
			//document.getElementsByTagName("body")[0].style.fontSize = "1.3em";
			$("div.title").css('font-size', '2em');
			$("div.subtitle").css('font-size', '1.6em');
			$("p").css('font-size', '1.5em');
			
			
			break;	
	}
	document.getElementById(currentSize).style.color = "#66AAFF";
	setCookie("fontSize",currentSize,10000);
}

function initChangeFontSize() {
	if (readCookie("fontSize")) {
		currentSize = readCookie("fontSize");
		changeFontSize(currentSize);
	} else {
		currentSize = "txtSize_small";
	}
	document.getElementById(currentSize).style.color = "#66AAFF";
}