var font_size = 11;
var font_original = 11;
var min_font = 9;
var max_font = 15;

function saveFontSize(){
	var expire = new Date ();
   	expire.setTime (expire.getTime() + (6000 * 24 * 3600000)); //expires in 6 days from users clock
   	expire = expire.toGMTString();
	document.cookie="font_size="+font_size+"; expires="+expire;
}
function loadFontSize(){

  tempArray = document.cookie.split(";");		
  for (tA = 0; tA < tempArray.length; tA++){
	if (tempArray[tA].indexOf('font_size') > -1){
 	  fontValue = tempArray[tA].split("=");
	  font_size = parseInt(fontValue[1]);
	}
  }
}
function setFontSize(){	
  loadFontSize()
  obj = document.getElementById("stext");
  obj.style.fontSize = font_size+"px";
}
function plus (){
  obj = document.getElementById("stext");
  font_size = obj.style.fontSize;
  font_size = parseInt(font_size); 
  if (font_size < max_font)  font_size = font_size + 1;
  obj.style.fontSize = font_size;
  saveFontSize();
}
function minus (){
  obj = document.getElementById("stext");
  font_size = obj.style.fontSize;
  font_size = parseInt(font_size);
  if (font_size > min_font)  font_size = font_size - 1;
  obj.style.fontSize = font_size;
  saveFontSize()
}
function original (){
  obj = document.getElementById("stext");
  font_size = font_original;
  obj.style.fontSize = font_size;
  saveFontSize()
}