/* toggle menus */
function toggleBullet(imgId, subMenuId)
{
	var subMenu = $(subMenuId);
	var subImage = $(imgId);
		
	var imgURL = webroot + 'content/images/bullet_open.gif';
	var imgURL_closed = webroot + 'content/images/bullet_closed.gif';
	
	// close all
	for (var x=1; x < 4; x++)
	{
		if (subMenuId!='sub' + x)
		{
		    if ($('subimg' + x) && $('sub' + x)){ // avoid missing reference errors
			if ($('subimg' + x).src.indexOf('locked') == -1)
			{
				$('sub' + x).style.display='none';
				$('subimg' + x).src = imgURL_closed;
				
				// sub2b exception
				if (x==2)
				{
		            if ($('sub2b')!=null)
		                $('sub2b').style.display='none';
		            if ($('liByType')!=null)
		                $('liByType').style.display='none';
		            if ($('liByDiscipline')!=null)
		                $('liByDiscipline').style.display='none';
				}				
			}}
		}
	}
	
	
	// toggle current
	if (subMenu.style.display=='none')
	{
		subImage.src = imgURL
		subMenu.style.display='block';
		
		// sub2b exception
		if (subMenuId=='sub2')
		{
		    if ($('sub2b')!=null)
		        $('sub2b').style.display='block';
		    if ($('liByType')!=null)
		        $('liByType').style.display='block';
		    if ($('liByDiscipline')!=null)
		        $('liByDiscipline').style.display='block';
		}
	}
	else
	{
		subImage.src = imgURL_closed
		subMenu.style.display='none';
		
		// sub2b exception
		if (subMenuId=='sub2')
		{
		    if ($('sub2b')!=null)
		        $('sub2b').style.display='none';
		    if ($('liByType')!=null)
		        $('liByType').style.display='none';
		    if ($('liByDiscipline')!=null)
		        $('liByDiscipline').style.display='none';

		}
	}

}

/* swap images */
function MM_findObj(n, d) { //v3.0
  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); 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_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_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];}}
}