var ns4 = (navigator.appName.indexOf("Netscape")!=-1 && navigator.appVersion.substring(0,1) < "5")? true:false
var ns6 = (navigator.appName.indexOf("Netscape")!=-1 && navigator.appVersion.substring(0,1) >= "5")? true:false
var ie  = (navigator.appName.indexOf("Microsoft Internet Explorer")!=-1)? true:false

function show_id(id_name) {		
   if(ie) {
		document.all[id_name].style.display = "block";	
	}	
	else if(ns4) {
	   document.layers[id_name].style.display = "block";
	}	
	else {
		document.getElementById(id_name).style.display = "block";
	}
}

function hide_id(id_name) {		
   if(ie) {
		document.all[id_name].style.display = "none";	
	}	
	else if(ns4) {
	   document.layers[id_name].style.display = "none";
	}	
	else {
		document.getElementById(id_name).style.display = "none";
	}
}

if (document.images) { 		
		sboff = new Image(); sboff.src="/channel/images/search/sbox_plus.gif";
        sbon  = new Image();  sbon.src="/channel/images/search/sbox_minus.gif";
		}
		
function showhide_id(id_name) {		
   if(ie) {
		displayer = document.all[id_name].style;
	}	
	else if(ns4) {
	   displayer = document.layers[id_name].style;
	}	
	else {
		displayer = document.getElementById(id_name).style;
	}
		
	if(displayer.display == "block") {
		displayer.display = "none";
		if(document.images[id_name+"_img"]) document.images[id_name+"_img"].src = sboff.src;
	}
	else if(displayer.display == "none") {
		displayer.display = "block";
		if(document.images[id_name+"_img"]) document.images[id_name+"_img"].src = sbon.src;
	}
}

var opener;
var closer;
var actcontent;
var positioning = true;
var leftpos = -115;
var toppos = 20;

function showpopnav(objname,objcontent,posdiv) {

	if(objcontent) {
		document.getElementById(objname).style.display = 'none';
		positioning = true;
	}
	var obj = document.getElementById(objname);
	
	if(positioning) {
	if(objcontent) document.getElementById(objname+"content").innerHTML = objcontent;
	opener = setTimeout(function(){
		obj.style.left = (posdiv.offsetLeft+leftpos) + "px";
    	obj.style.top  = (posdiv.offsetTop+toppos) + "px";
		obj.style.display = "block";
		positioning = false;
		}, 200);
	actcontent = objcontent;
	} else {
		obj.style.display = "block";	
	}	
	clearTimeout(closer);
}

function hidepopnav(objname) {
	var obj = document.getElementById(objname);
	closer = setTimeout(function(){
		obj.style.display = 'none';
		positioning = true;
		}, 100);
	clearTimeout(opener);
}

function show_id(id_name) {		
		document.getElementById(id_name).style.display = "block";
}

function hide_id(id_name) {		
		document.getElementById(id_name).style.display = "none";
}

function show_bbs_answer() {
   show_id('bbs_answer');  
   hide_id('bbs_answer_switch_on');
   show_id('bbs_answer_switch_off');
}

function hide_bbs_answer() {
   hide_id('bbs_answer');  
   show_id('bbs_answer_switch_on');
   hide_id('bbs_answer_switch_off');
}

function showAdd()
	{
		if(document.getElementById('newDataset').style.display == 'none') {
			document.getElementById('newDataset').style.display = 'block';
			}
		else {
			document.getElementById('newDataset').style.display = 'none';
		}
	}
	
function setActive(picId)
{
	document.getElementById('best').style.display = "none";
	document.getElementById('gallery').style.display = "none";
	document.getElementById('last').style.display = "none";
	document.getElementById('discussed').style.display = "none";
	document.getElementById(picId).style.display = "block";
}

function forum(node_pk) {
   var ther = "/cgi-bin/bbs/bbs.pl?node_pk="+node_pk+"&todo=print_preview";
	window.open(ther,'bbs_print_preview','width=640,height=480,scrollbars=1,toolbar=0,menubar=1');
}