var user_agent = navigator.userAgent.toLowerCase();


function setTextSize(size) {
	if(document.getElementsByTagName) {
		var bodyTag = document.getElementsByTagName("body");
		var textsize = document.getElementById('textsize');
		
		if(bodyTag && textsize) {			
			switch(size) {
				case "small": 
					document.getElementById('medium').className = "medium";
					document.getElementById('large').className = "large";
					bodyTag.item(0).style.fontSize = "80%";					
					break;
				case "medium": 
					document.getElementById('small').className = "small";
					document.getElementById('large').className = "large";
					bodyTag.item(0).style.fontSize = "90%";
					break;
				case "large": 
					document.getElementById('small').className = "small";
					document.getElementById('medium').className = "medium";
					bodyTag.item(0).style.fontSize = "100%";
					break;
			}
			document.getElementById(size).className += " selected";
						
			// Set code to add this setting to a cookie; Invalidate the cookie after session?
			setCookie("textsize", size, null, "/", "", null);
		}
	}
}

function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;


/*

internet explorer on windows needs a refresh upon setting the cookie, 
so we need to do something like this:

	if (document.all && user_agent.indexOf("Opera") == -1)
	{
		history.go(0);
	}

but, ie win just spits this up too.

*/

}

function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}