//browser detection
var ie4 	= (document.all)    ? true : false;
var ns4 	= (document.layers) ? true : false;
var ns6 	= (document.getElementById && !document.all) ? true : false;

var open_pic	= 'http://images.thesanctuarynet.org/minus.gif';	//the [-] next to menu item
var closed_pic = 'http://images.thesanctuarynet.org/plus.gif';		//the [+] next to menu items

//called when someone clicks on the [+]/[-] on a menu item
//chooses whether to open or close the menu and calls openDiv()/closeDiv() accordingly
 function changeDiv(lay) {
       if (ie4) {
       	if(document.all[lay].style.display == 'none')
       	{
		closeAll();
       		openDiv(lay);
       	}else{
       		closeDiv(lay);
       	}
       }
       if (ns4) {
       	if(document.layers[lay].visibility == 'hide')
       	{
		closeAll();
       		openDiv(lay);
       	}else{
       		closeDiv(lay);
       	}
       }
       if (ns6) {
       	if(document.getElementById([lay]).style.display == 'none')
       	{
		closeAll();
       		openDiv(lay);
       	}else{
       		closeDiv(lay);
       	}
       }
 }

//opens the menu branch passed to it and changes the [+] to a [-]
 function closeDiv(lay) {
 	var bgcolor='';
	if (ie4)
	{
       		document.all[lay].style.display = 'none';
       		//document.all[lay+'p'].style.background = bgcolor;
	}
	if (ns4)
	{
		document.layers[lay].visibility = 'hide';
	}
	if (ns6)
	{
		document.getElementById([lay]).style.display = 'none';
       		//document.getElementById([lay+'p']).style.background = bgcolor;
	}
	//document.images[lay+'i'].src = closed_pic;
 }

//closes the tree passed to it and changes the [-] to a [+]
 function openDiv(lay) {
 	var bgcolor = '';
	if (ie4)
	{
		document.all[lay].style.display = '';
		//document.all[lay+'p'].style.background = bgcolor;
	}
	if (ns4)
	{
		document.layers[lay].visibility = 'show';
	}
	if (ns6) {
		document.getElementById([lay]).style.display = '';
		//document.getElementById([lay+'p']).style.background = bgcolor;
	}
	//document.images[lay+'i'].src = open_pic;
 }
 function closeAll()
 {
	for (var i = 0; i < cat_ids.length; i++) 
	{
		closeDiv('div_'+cat_ids[i]);
	}
 }


//functions for changing the mouse pointer to a hand when the mouse goes over the [+]/[-]
 function MouseHandlerOver( bPtr )
 {
 	bPtr.style.cursor = "hand";
 }
 function MouseHandlerOut( bPtr )
 {
 	bPtr.style.cursor = "default";
 }