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 > 220){
		currentFontSize = 220;
	}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 + '%';

	//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);
}

function changeToolHilite(oldtool, newtool) {
	if (oldtool != newtool) {
		if (oldtool) {
			oldtool.src = oldtool.src.replace(/-hilite/,'');
		}
		newtool.src = newtool.src.replace(/.gif$/,'-hilite.gif');
	}
}

function setActiveStyleSheet(title) {

	createCookie("ColorCSS", title, 365);
	window.location.reload();
	return;

  var i, a, main, arr;
  arr = document.getElementsByTagName("link");
  for(i=0; (a = arr[i]); i++) {
  	var ltitle = a.getAttribute("title");
    if(a.getAttribute("rel").indexOf("style") != -1 && ltitle) {
      a.disabled = true;
      if(ltitle == title) a.disabled = false;
    }
  }
  createCookie("ColorCSS", title, 365);
}

function setScreenType(screentype){
	bclass = document.body.className.trim();
	if (bclass.indexOf(' ') > 0){
		bclass = bclass.replace(/^\w+/,screentype);
	}else{
		bclass = screentype + ' ' + bclass;
	}

	document.body.className = bclass;
	createCookie("ScreenType", screentype, 365);
}

String.prototype.trim = function() { return this.replace(/^\s+|\s+$/g, ""); };