function createCookie(name,value) {
	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;
}

function readCookies() {
	getFontSize();
	getStylesheet();
}

/* Font resizing functions */
function getFontSize() {
	var cookie = readCookie('font');
	s=document.getElementById('main'); 
	if (!cookie) {
		s.style.fontSize = 'medium';
	}
	else {
		s.style.fontSize = cookie;
	}
}

function reduceFont() {
	s=document.getElementById('main'); 

	var fSize=s.style.fontSize;
	switch (fSize) {
		case 'x-small':
			newFont = 'x-small';
		break;
		case 'small':
			newFont = 'x-small';
		break;
		case 'medium':
			newFont = 'small';
		break;
		case 'large':
			newFont = 'medium';
		break;
		case 'x-large':
			newFont = 'large';
		break;
		default: 
			newFont = 'medium';
	}
	
	s.style.fontSize = newFont;
	createCookie('font', newFont);
}

function enlargeFont() {
	s=document.getElementById('main'); 

	var fSize=s.style.fontSize;
	switch (fSize) {
		case 'x-small':
			newFont = 'small';
		break;
		case 'small':
			newFont = 'medium';
		break;
		case 'medium':
			newFont = 'large';
		break;
		case 'large':
			newFont = 'x-large';
		break;
		case 'x-large':
			newFont = 'x-large';
		break;
		default: 
			newFont = 'medium';
	}
	s.style.fontSize = newFont;
	createCookie('font', newFont);
}
	

/* Select stylesheet functions */
function getStylesheet() {
	var cookie = readCookie('style');
	if (!cookie) {
		setActiveStyleSheet('base');
	}
	else {
		setActiveStyleSheet(cookie);
	}
}

function setActiveStyleSheet(title) {
//	title = tt.options[select.selectedIndex].value;
   var i, a, main;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
     if(a.getAttribute("rel").indexOf("style") != -1
        && a.getAttribute("title")) {
       a.disabled = true;
       if(a.getAttribute("title") == title) a.disabled = false;
		createCookie('style', title);
     }
   }
}