function getPreferredStyle() {
	var styleCookie = readCookie('style');
	var style = 'font-normal';
	if(styleCookie && styleCookie.indexOf('font-') == 0) {
		style = styleCookie;
	}
	return style;
}
function toggleFontsize(normalText,largeText) {
    var style = getPreferredStyle();
	switch(style) {
        case 'font-normal':
        	setActiveStyleSheet('font-large');
        	if(typeof $('font-size-toggler') != "undefined") {
        		$('font-size-toggler').innerHTML = normalText;
        	}
        	break;
        case 'font-large':        
        	setActiveStyleSheet('font-normal');
        	if(typeof $('font-size-toggler') != "undefined") {
        		$('font-size-toggler').innerHTML = largeText;
        	}
        	break;
    }
}
function updateFontSelectorText(normalText,largeText) {
	var style = getPreferredStyle();
	switch(style) {
        case 'font-normal':
    		$('font-size-toggler').innerHTML = largeText;
        	break;
        case 'font-large':        
    		$('font-size-toggler').innerHTML = normalText;
       	 break;
    }
}

function setActiveStyleSheet(title) {
    var style = getPreferredStyle();
	var i, a, main;    
    if(title.indexOf('font-') == 0) {    
	    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) {
	                a.disabled = false;	                
	            } else {
	                a.disabled = true;
	            }
	        }
	    }
	    if(title != style) {
        	createCookie("style", title, 365);
        }    
    }
}
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 = function(e) {
    var cookie = readCookie("style");
    var title = cookie ? cookie : getPreferredStyle();
    setActiveStyleSheet(title);
}

var preferredStyle = getPreferredStyle();
setActiveStyleSheet(preferredStyle);