var stayFolded=false

//expanded image
var exImg=new Image(); exImg.src='minus.bmp'
//unfolded image
var unImg=new Image(); unImg.src='plus.bmp'

var n = (document.layers) ? 1:0;
var ie = (document.all) ? 1:0;
var browser=((n || ie) && parseInt(navigator.appVersion)>=4)  

function makeMenu(obj,nest){
	nest=(!nest) ? '':'document.'+nest+'.'										
	this.css=(n) ? eval(nest+'document.'+obj):eval('document.all.'+obj+'.style')					
   	this.ref=(n) ? eval(nest+'document.'+obj+'.document'):eval('document');		
	this.height=n?this.ref.height:eval(obj+'.offsetHeight')
	this.x=(n)? this.css.left:this.css.pixelLeft;this.y=(n)? this.css.top:this.css.pixelTop;							
	this.hideIt=b_hideIt;	this.showIt=b_showIt; this.vis=b_vis; this.moveIt=b_moveIt											
	return this
}
function b_showIt(){this.css.visibility="visible"}
function b_hideIt(){this.css.visibility="hidden"}
function b_vis(){if(this.css.visibility=="hidden" || this.css.visibility=="hide") return true;}
function b_moveIt(x,y){this.x=x; this.y=y; this.css.left=this.x; this.css.top=this.y}

function init(){
	oTop=new Array()
	oTop[0]=new makeMenu('divTop1','divCont')
	oTop[1]=new makeMenu('divTop2','divCont')
	oTop[2]=new makeMenu('divTop3','divCont')
	oTop[3]=new makeMenu('divTop4','divCont')
	oTop[4]=new makeMenu('divTop5','divCont')
	oSub=new Array()
	oSub[0]=new makeMenu('divSub1','divCont.document.divTop1')
	oSub[1]=new makeMenu('divSub2','divCont.document.divTop2')
	oSub[2]=new makeMenu('divSub3','divCont.document.divTop3')
	oSub[3]=new makeMenu('divSub4','divCont.document.divTop4')
	oSub[4]=new makeMenu('divSub5','divCont.document.divTop5')
	for(i=0;i<oSub.length;i++){ oSub[i].hideIt() }
	for(i=1;i<oTop.length;i++){ oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].height)}
}

function menu(num){
	if(browser){
		if(!stayFolded){
			for(i=0;i<oSub.length;i++){
				if(i!=num){
					oSub[i].hideIt()
					oTop[i].ref["imgA"+i].src=unImg.src
				}
			}
			for(i=1;i<oTop.length;i++){
				oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].height)
			}
		}
		if(oSub[num].vis()){
			oSub[num].showIt()
			oTop[num].ref["imgA"+num].src=exImg.src
		}else{
			oSub[num].hideIt()
			oTop[num].ref["imgA"+num].src=unImg.src
		}
		for(i=1;i<oTop.length;i++){ 
			if(!oSub[i-1].vis()) oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].height+oSub[i-1].height) 
			else oTop[i].moveIt(0,oTop[i-1].y+oTop[i-1].height)
		}
	}
}

if(browser) onload=init;