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 * 5);

 if(currentFontSize > 130){
 currentFontSize = 130;
 }else if(currentFontSize < 85){
 currentFontSize = 85;
 }
 setFontSize(currentFontSize);
};

function setFontSize(fontSize){
 document.getElementById('dcontent').style.fontSize = fontSize + '%';
 document.getElementById('dleft').style.fontSize = fontSize + '%';
 currentFontSize = fontSize;
 //alert (document.getElementById('dcontent').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);
}