var currentDisplay = "";
var currentZoom = "";
var currentSegment = "";

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;
}


function setCurrentSelection(name, value, reload) {
  	createCookie(name, value, 365);
  	if (reload) {
		window.location.reload();
  	}
}

function setZoom(value) {
	setCurrentSelection("zoom", value, true);
}

function setDisplay(value) {
	setCurrentSelection("colo", value, true);
}

function setSegment(value) {
	setCurrentSelection("segm", value, false);
}

function insertStyle() {
	currentZoom = readCookie("zoom");
	if (currentZoom) {
		writeStyleInsert("/8css/accessibility/" + currentZoom);
	}
	currentDisplay = readCookie("colo");
	if (currentDisplay) {
		writeStyleInsert("/8css/accessibility/" + currentDisplay);
		checkForSectionCSS(currentDisplay);
	}
}

function writeStyleInsert(fileName) {
	document.write("<link rel=\"stylesheet\" type=\"text/css\" href=\"" + fileName + ".css\" media=\"screen\"/>");
}
function checkForSectionCSS(currentDisplay) {
	var links = document.getElementsByTagName("link");
	var length = links.length;
	currentDisplay = currentDisplay.substring(5).toLowerCase();
	if (currentDisplay!="normal") {
		for(i=0; i < length ; i++) {
			var element=links[i];
			var href = element.getAttribute("href");
			if (element.getAttribute("rel").indexOf("style") != -1 &&
				href.indexOf("/8css/sectioncss/")==0) {
					var targetCSS = href.substring(0, href.indexOf(".css")) + currentDisplay;
					writeStyleInsert(targetCSS);
			}
		}
	}
}
function showAccessibilityOptions() {
	if (currentZoom == "") {
		currentZoom = readCookie("zoom");
	}
	var zoomSelector = document.getElementById("zoom");
	for (var i = 0; i < zoomSelector.options.length; i++) {
		if (currentZoom == zoomSelector.options[i].value) {
			zoomSelector.options[i].selected = "selected";
			break;
		}
	}
	document.getElementById("accessibility").style.display = "block";
}
function setSelectedSegment() {
	currentSegment = readCookie("segm");
	var segmentSelector = document.getElementById("segmentSelector");
	if (segmentSelector) {
		for (var i = 0; i < segmentSelector.options.length; i++) {
			if (currentSegment == segmentSelector.options[i].text) {
				segmentSelector.options[i].selected = "selected";
				break;
			}
		}
	}
}