//Load our page init function
window.onload = apl_init;


function apl_init() {
	//check for textsize
	if(getCookie("textsize")) {		
		setTextSize(getCookie("textsize"));
	}
}

function setTextSize(size) {
	if(document.getElementsByTagName) {
		var bodyTag = document.getElementsByTagName("body");
		
		if(bodyTag) {			
			switch(size) {
				case "small": 
					document.getElementById('medium').className = "medium replace";
					document.getElementById('large').className = "large replace";
					bodyTag.item(0).style.fontSize = "75%";
					break;
				case "medium": 
					document.getElementById('small').className = "small replace";
					document.getElementById('large').className = "large replace";
					bodyTag.item(0).style.fontSize = "95%";
					break;
				case "large": 
					document.getElementById('small').className = "small replace";
					document.getElementById('medium').className = "medium replace";
					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);
		}
	}
}


/*
   name - name of the cookie
   value - value of the cookie
   [expires] - expiration date of the cookie
     (defaults to end of current session)
   [path] - path for which the cookie is valid
     (defaults to path of calling document)
   [domain] - domain for which the cookie is valid
     (defaults to domain of calling document)
   [secure] - Boolean value indicating if the cookie transmission requires
     a secure transmission
   * an argument defaults when it is assigned null as a placeholder
   * a null placeholder is not required for trailing omitted arguments
*/

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;
}


/*
  name - name of the desired cookie
  return string containing value of specified cookie or null
  if cookie does not exist
*/

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));
}


/*
   name - name of the cookie
   [path] - path of the cookie (must be same as path used to create cookie)
   [domain] - domain of the cookie (must be same as domain used to
     create cookie)
   path and domain default if assigned null or omitted if no explicit
     argument proceeds
*/

function deleteCookie(name, path, domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"

function fixDate(date) {
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0)
    date.setTime(date.getTime() - skew);
}