// for GreatKids, Inc.
// Copyright (c) 2003 Todd Roseman, LUKY.COM, ALL RIGHTS RESERVED.
// DO NOT COPY WITHOUT PERMISSION - ALL RIGHTS RESERVED.

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_nbGroup(event, grpName) { //v6.0
  var i,img,nbArr,args=MM_nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
      img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
        if (!img.MM_up) img.MM_up = img.src;
        img.src = img.MM_dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.MM_nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = (img.MM_dn && args[i+2]) ? args[i+2] : ((args[i+1])? args[i+1] : img.MM_up);
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.MM_nbOver.length; i++) {
      img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
  } else if (event == "down") {
    nbArr = document[grpName];
    if (nbArr)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = img.MM_dn = (args[i+1])? args[i+1] : img.MM_up;
      nbArr[nbArr.length] = img;
  } }
}


function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}


if (document.getElementById){ //DynamicDrive.com change
	document.write('<style type="text/css">\n');
	document.write('.submenu{display: none;}\n');
	document.write('</style>\n');
}


function gkpreload(obj,submenu,idon)	{
	MM_preloadImages('images/nav-about-on2.gif','images/nav-train-on3.gif','images/nav-ggk-on3.gif','images/nav-dev-on3.gif','images/nav-eval-on3.gif', 'images/nav-diff-on.gif');
	if (obj)
		SwitchOver(obj,submenu,idon);
}

function gksubpreload(obj,submenu,idon)	{
	MM_preloadImages('../images/nav-about-on2.gif','../images/nav-train-on3.gif','../images/nav-ggk-on3.gif','../images/nav-dev-on3.gif','../images/nav-eval-on3.gif', '../images/nav-diff-on.gif');
	SwitchOver(obj,submenu,idon);
}


function SwitchOver(obj,submenu,idon)	{
	var el;
	// turn off last one
	if (obj == document.gk_lastid)
		return;
	if (document.gk_lastid)	{
		el = MM_findObj(document.gk_lastid);
		if (el)	{
			el.src = document.gk_lastsrc;
		}
	}
	// turn on this one
	el = MM_findObj(obj);
	if (el)	{
		document.gk_lastid = obj;
		document.gk_lastsrc = el.src;
		el.src = document.MM_p[idon].src;
	}
	
	// show correct submenu
	SwitchMenu(submenu);
}

function SwitchMenu(obj){
	if(document.getElementById){
		var el = document.getElementById(obj);
		var ar = document.getElementById("masterdiv").getElementsByTagName("div"); //DynamicDrive.com change, was span
// display obj as block, others none		
//		if(el.style.display != "block"){ //DynamicDrive.com change
			for (var i=0; i<ar.length; i++){
				if (ar[i].className=="submenu") //DynamicDrive.com change
				ar[i].style.display = "none";
			}
			el.style.display = "block";
//		}else{
//			el.style.display = "none";
//		}
	}
}