// for opening popup windows
function openNewWindow(theURL,winName,features, myWidth, myHeight, isCenter) { 
  if(window.screen)if(isCenter)if(isCenter=="true"){
    var myLeft = (screen.width-myWidth)/2;
    var myTop = (screen.height-myHeight)/2;
    features+=(features!='')?',':'';
    features+=',left='+myLeft+',top='+myTop;
  }
	newWindow=window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
	newWindow.focus()
}

// clear text fields when selected
function MM_setTextOfTextfield(objId,x,newText) {
  with (document){ if (getElementById){
    var obj = getElementById(objId);} if (obj) obj.value = newText;
  }
}

// toggling hidden elements between display:none and display:block
// usage: onclick="toggleItem('id_of_hidden_element');return false"
function toggleItem(id){
	itemVisible = (document.getElementById(id).style.display == "block") ? false : true;
	document.getElementById(id).style.display = (itemVisible) ? "block" : "none";
}

// changing the css class of an id. 
// usage: changeClass('name_of_target_id','name_of_new_class_within_target_id');
function changeClass(id, newClass) {
	identity=document.getElementById(id);
	identity.className=newClass;
}


// the following code is for increasing/decreasing text sizes on the website, and storing the choice in a cookie.
function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
  createCookie("style", title, 365);
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

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 styleSwitcherOnLoad() {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

function styleSwitcherOnUnload() {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

FastInit.addOnLoad(styleSwitcherOnLoad);