var ie=document.all?1:0
var ns6=document.getElementById&&!document.all?1:0
var opera=window.opera?1:0

var folder=''
var image=''
var sw="img/btn_answer_close.gif"	
var hd="img/btn_answer.gif"	

function showFolder(subobj, imgobj) {
	if (ie||ns6||opera) {
		folder=ns6?document.getElementById(subobj).style:document.all(subobj).style
		image=ns6?document.getElementById(imgobj):document.all(imgobj)
		if (folder.display=="none") {
			folder.display=""
			image.src=sw
		} else {
			folder.display="none"
			image.src=hd
		}
	}
}