// Toggle Display (BB)
var userAgent = navigator.userAgent.toLowerCase();
var is_opera  = (userAgent.indexOf('opera') != -1);
var is_saf    = ((userAgent.indexOf('applewebkit') != -1) || (navigator.vendor == "Apple Computer, Inc."));
var is_webtv  = (userAgent.indexOf('webtv') != -1);
var is_ie     = ((userAgent.indexOf('msie') != -1) && (!is_opera) && (!is_saf) && (!is_webtv));
var is_ie4    = ((is_ie) && (userAgent.indexOf("msie 4.") != -1));
var is_moz    = ((navigator.product == 'Gecko') && (!is_saf));
var is_kon    = (userAgent.indexOf('konqueror') != -1);
var is_ns     = ((userAgent.indexOf('compatible') == -1) && (userAgent.indexOf('mozilla') != -1) && (!is_opera) && (!is_webtv) && (!is_saf));
var is_ns4    = ((is_ns) && (parseInt(navigator.appVersion) == 4));

var vbDOMtype = '';
if (document.getElementById)
{
	vbDOMtype = "std";
}
else if (document.all)
{
	vbDOMtype = "ie4";
}
else if (document.layers)
{
	vbDOMtype = "ns4";
}


var vBobjects = new Array();


function fetch_object(idname)
{
	if (typeof(vBobjects[idname]) == "undefined")
	{
		switch (vbDOMtype)
		{
			case "std":
			{
				vBobjects[idname] = document.getElementById(idname);
			}
			break;

			case "ie4":
			{
				vBobjects[idname] = document.all[idname];
			}
			break;

			case "ns4":
			{
				vBobjects[idname] = document.layers[idname];
			}
			break;
		}
	}
	return vBobjects[idname];
}


function toggle_display(idname,picture_open,picture_close){

	var img="";
	var obj="";
	//var picture_open="";
	//var picture_close="";

	obj = fetch_object(idname);

	if (picture_open!="") {
		img = fetch_object(idname+"_1");
	}

	if (obj){
		if (obj.style.display == "none"){
			obj.style.display = "";
			if (picture_open!="") {
				img_re = new RegExp(picture_open +"\\.png$");
				img.src = img.src.replace(img_re, picture_close + ".png");	
			}
			
		} else {
			obj.style.display = "none";
			if (picture_open!="") {
				img_re = new RegExp(picture_close +"\\.png$");
				img.src = img.src.replace(img_re, picture_open + ".png");
			}
		}
	}
	return false;
}


function toggle_display2(idname){
	toggle_display(idname,'show','spacer');
}

function toggle_display3(idname){
	toggle_display(idname,'show2','spacer2');
}