var prefsLoaded = false;
var defaultFontSize = 100;
var currentFontSize = defaultFontSize;

function revertStyles()
{
	currentFontSize = defaultFontSize;
	changeFontSize(0);
}

function toggleColors()
{
	if(currentStyle == "White")
	{
		setColor("Black");
	}else{
		setColor("White");
	}
}

function changeFontSize(sizeDifference)
{
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 10);

	if(currentFontSize > 150)
	{
		currentFontSize = 150;
	 }else if(currentFontSize < 60){
		currentFontSize = 60;
	}
	setFontSize(currentFontSize);
};

function setFontSize(fontSize)
{
	var stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
	
	//document.body.style.fontSize = fontSize + '%';
	
	//Modif ND
	if(document.getElementById('doc_html'))
		document.getElementById('doc_html').style.fontSize = fontSize + '%';
	if(document.getElementById('doc_titre'))
		document.getElementById('doc_titre').style.fontSize = fontSize + '%';	
	if(document.getElementById('MenuVerti'))
		document.getElementById('MenuVerti').style.fontSize = fontSize + '%';	
		
	currentFontSize = fontSize;
 	//alert (document.body.style.fontSize);
}

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 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;
}

window.onload = setUserOptions;

function setUserOptions()
{
	if(!prefsLoaded)
	{
 		cookie = readCookie("fontSize");
		currentFontSize = cookie ? cookie : defaultFontSize;
 		setFontSize(currentFontSize);

		prefsLoaded = true;
 	}
}

window.onunload = saveSettings;

function saveSettings()
{
	createCookie("fontSize", currentFontSize, 365);
}