var prefsLoaded = false;
var defaultFontSize = 62.5;
var defaultFontColor = "white";
var currentFontSize = defaultFontSize;
var currentFontColor = defaultFontColor;

function revertStyles(){

        currentFontSize = defaultFontSize;
        changeFontSize(0);
        setFontColor("white")

}



function changeFontSize(sizeDifference){
        currentFontSize = parseFloat(currentFontSize) + parseFloat(sizeDifference * 5);

        if(currentFontSize > 82.5){
                currentFontSize = 82.5;
        }else if(currentFontSize < 62.5){
                currentFontSize = 62.5;
        }

        setFontSize(currentFontSize);
};

function setFontSize(fontSize){
        var stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
        document.body.style.fontSize = fontSize + '%';

        //alert (document.body.style.fontSize);
};

function changeFontColor(){
		if(currentFontColor == "white"){
                setFontColor("black");
        }else{
                setFontColor("white");
        }
}

function setFontColor(fontColor){	
		if(fontColor == "white"){
                document.getElementsByTagName('link')[2].href = 'fileadmin/template/css/color.css';
        }else{
                document.getElementsByTagName('link')[2].href = 'fileadmin/template/css/color_k.css';
        }
        currentFontColor = fontColor;
		//alert(fontColor);
};



function createCookie(name_size,value_size,name_color,value_color,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_size+"="+value_size+expires+"; path=/";
  document.cookie = name_color+"="+value_color+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);
                
                cookie = readCookie("fontColor");
                currentFontColor = cookie ? cookie : defaultFontColor;
                setFontColor(currentFontColor);

                prefsLoaded = true;
        }

}

window.onunload = saveSettings;

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