
//////////////////////////////////////////////////
// Image preloading code to support legacy pages.

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_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_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_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];}
}

function MM_reloadPage(init)
{
//reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}

//////////////////////////////////////////////////
// code related to popup menus.  Primary used by
// art section index.

// Show a specific menu, hiding
// any other menus.
var currentMenu = '';
var mousedMenu = '';
var menuTimeout = 0;
function menuShow(name, me)
{
	// cycle through all menus
	var menus = document.getElementsByName('gmenu');
	var i;
	
	// IE does not allow getElementsByName()
	// to work on DIVs
	if (menus.length < 1)
	{
		menus = document.getElementsByTagName('div');
	}

	for (i=0;i<menus.length;i++)
	{
		if (menus[i].id == 'menu_'+name)
		{
			// show this menu
			var pos = getDim(me);
			var menu = document.getElementById('menu_'+name);
			menu.style.left = pos.r+'px';
			menu.style.top = pos.t+'px';
			menu.style.visibility = "visible";
			currentMenu = name;
		} else if (menus[i].id.substring(0, 5) == 'menu_') {
			// hide this menu
			menus[i].style.visibility = 'hidden';
		}
	}
}

// Hide menu after certain number of seconds
// if it's not moused over.
function menuCountdown()
{
	if (menuTimeout != 0)
	{
		clearTimeout(menuTimeout);
	}
	menuTimeout = setTimeout("menuHide('"+currentMenu+"')", 1000);
}

// Hide specific menu.
function menuHide(name)
{
	if (currentMenu == name
		&& name != mousedMenu)
	{
		var menu = document.getElementById('menu_'+name);
		menu.style.visibility = "hidden";
		currentMenu = '';	
	}
}

// Get coordinates of a flow-positioned div
// relative to <body>
function getDim (obj)
{
	obj.style.height="auto";
	obj.style.width="auto";
	var ret = new Object;
	var tmp = new Object;
	ret.h = obj.offsetHeight;
	ret.w = obj.offsetWidth;
	ret.l = obj.offsetLeft;
	ret.t = obj.offsetTop;
	
	tmp = obj.offsetParent;
	while (tmp)
	{
		ret.l += tmp.offsetLeft;
		ret.t += tmp.offsetTop;
		tmp = tmp.offsetParent;
	}

	ret.r = ret.l + ret.w;
	
	return ret;
}
