//START Font Change Functions
function FontNormal() {
document.getElementById('stylesheet').href = '/site/css/styles_cn.css';
}

function FontLarge() {
document.getElementById('stylesheet').href = '/site/css/styles_cl.css';
}

function FontLarger() {
document.getElementById('stylesheet').href = '/site/css/styles_cx.css';
}
//END Font Change Functions


//START Page Tabs Turn
function sellay(num){
for(var id = 1;id<=3;id++)
  {
	var tabcon="tab_box"+id;
	if(id==num)
	document.getElementById(tabcon).style.display="block";
	else
	document.getElementById(tabcon).style.display="none";
  }

for(var id = 1;id<=3;id++)
  {
	var tabnum="tab_num"+id;
	if(id==num)
	document.getElementById(tabnum).className="tab_turnOn";
	else
	document.getElementById(tabnum).className="tab_turn";
  } 
}
//END Page Tabs Turn



//####### START: Show PopNav Layer ########################################################

function GetPopNavPosition(parent, child)
{
  var p = document.getElementById(parent);
  var c = document.getElementById(child );

  var top  = (c["at_position"] == "y") ? p.offsetHeight : 0;
  var left = (c["at_position"] == "x") ? p.offsetWidth : 0;
  
  for (; p; p = p.offsetParent)
  {
    top  += p.offsetTop;
    left += p.offsetLeft;
  }
  //align the new layer to the top left corner
  p = document.getElementById(parent)
  top = top - p.offsetHeight;
  
  c.style.position   = "absolute";
  c.style.top        = top +'px';
  c.style.left       = left+'px';
  c.style.visibility = "visible";
}

// ----- Show -----

function ShowPopNav()
{
  
  var p = document.getElementById(this["at_parent"]);
  var c = document.getElementById(this["at_child" ]);

  GetPopNavPosition(p.id, c.id);
  clearTimeout(c["at_timeout"]);
  
}

// ----- Hide -----
function HideAction(cid) 
{
	document.getElementById(cid).style.visibility = 'hidden';
	document.getElementById(cid).style.top = '0px';
	document.getElementById(cid).style.left = '0px';
}

function HidePopNav()
{
  var c = document.getElementById(this["at_child"]);
  
  c["at_timeout"] = setTimeout("HideAction('"+c.id+"')", 50);

  //c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.visibility = 'hidden'", 50);
  //c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.top = '0px'", 50);
  //c["at_timeout"] = setTimeout("document.getElementById('"+c.id+"').style.left = '0px'", 50);
}

// ----- Click -----

function ClickPopNav()
{
  var p = document.getElementById(this["at_parent"]);
  var c = document.getElementById(this["at_child" ]);

  if (c.style.visibility != "visible")
        GetPopNavPosition(p.id, c.id);
  else c.style.visibility = "hidden";

  return false;
}

// ----- Attach -----

// PARAMETERS:
// parent   - id of visible html element
// child    - id of invisible html element that will be dropdowned
// showtype - "click" = you should click the parent to show/hide the child
//            "hover" = you should place the mouse over the parent to show
//                      the child
// position - "x" = the child is displayed to the right of the parent
//            "y" = the child is displayed below the parent
// cursor   - Omit to use default cursor or check any CSS manual for possible
//            values of this field

function AttachPopNav(contentarea)
{
  var p = document.getElementById(contentarea);
  var c = document.getElementById(contentarea + "_c");
  if (p != null && c != null) {
  var showtype = "hover"
  var position = "y"
  var cursor = "pointer"

  p["at_parent"]     = p.id;
  c["at_parent"]     = p.id;
  p["at_child"]      = c.id;
  c["at_child"]      = c.id;
  p["at_position"]   = position;
  c["at_position"]   = position;

  c.style.position   = "absolute";
  c.style.visibility = "hidden";

  if (cursor != undefined) p.style.cursor = cursor;

  switch (showtype)
  {
    case "click":
      p.onclick     = ClickPopNav;
      p.onmouseout  = HidePopNav;
      c.onmouseover = ShowPopNav;
      c.onmouseout  = HidePopNav;
      break;
    case "hover":
      p.onmouseover = ShowPopNav;
      p.onmouseout  = HidePopNav;
      c.onmouseover = ShowPopNav;
      c.onmouseout  = HidePopNav;
      break;
  }
  }
}


function AttachPopLayer(triggerid, anchorid, layerid)
{
  var t = document.getElementById(triggerid);
  var p = document.getElementById(anchorid);
  var c = document.getElementById(layerid);
  if (p != null && c != null) {
  var showtype = "hover"
  var position = "y"
  var cursor = "pointer"

  t["at_parent"] 	 = p.id;
  p["at_parent"]     = p.id;
  c["at_parent"]     = p.id;
  t["at_child"]      = c.id;
  p["at_child"]      = c.id;
  c["at_child"]      = c.id;
  t["at_position"]   = position;
  p["at_position"]   = position;
  c["at_position"]   = position;

  c.style.position   = "absolute";
  c.style.visibility = "hidden";

  if (cursor != undefined) t.style.cursor = cursor;

  switch (showtype)
  {
    case "click":
      t.onclick     = ClickPopNav;
      t.onmouseout  = HidePopNav;
      c.onmouseover = ShowPopNav;
      c.onmouseout  = HidePopNav;
      break;
    case "hover":

      t.onmouseover = ShowPopNav;
      t.onmouseout  = HidePopNav;
      c.onmouseover = ShowPopNav;
      c.onmouseout  = HidePopNav;
      break;
  }
  }
}

//####### END: Show PopNav Layer ########################################################