/********************************************************************************
Copyright (C) 1999 Thomas Brattli
This script is made by and copyrighted to Thomas Brattli at www.bratta.com
Visit for more great scripts. This may be used freely as long as this msg is intact!
I will also appriciate any links you could give me.
********************************************************************************/
//Default browsercheck, added to all scripts!
function checkBrowser(){
	this.ver=navigator.appVersion
	this.dom=document.getElementById?1:0
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
	this.ie4=(document.all && !this.dom)?1:0;
	this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;
	this.ns4=(document.layers && !this.dom)?1:0;
	this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5)
	return this
}
bw=new checkBrowser()
//Do you want it to move with the page if the user scroll the page?
var moveOnScroll=false

numberOfMenus=3//How many menus do you have

//Do you want to hide all the other submenus when you click a new?
var hideAll=true

//How much from top do you want the menu?
fromTop=0

/********************************************************************************
If you want to change the appearans on the text, or background or anything
do that in the style tag above, or in the table tag below.

The different event handling on the different browsers makes this a little
tricky. I had to make all divs absolute positioned to make it work in netscape.
So if you ad or remove menuitems please play with the % values of each divTop
in the stylesheet. I have not had all that much luck with % placement before
in netscape so if you encounter any errors et me know and I'll see what I can do.
********************************************************************************/


/********************************************************************************
Object constructor
********************************************************************************/
function makeMenuBar(obj,nest,vis){
    nest=(!nest) ? '':'document.'+nest+'.'
   	this.css=bw.dom? document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+"document.layers." +obj):0;		
	this.hideIt=b_hideIt;	this.showIt=b_showIt					
	if((bw.dom || bw.ie4) && vis) this.css.visibility='hidden'
	this.evnt=bw.dom? document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+"document.layers." +obj):0;		
	this.go=0
	this.height=bw.ns4?this.css.document.height:this.evnt.offsetHeight
	this.top=b_gettop
    this.obj = obj + "Object"; 	eval(this.obj + "=this")	
}
//Get's the top position.
function b_gettop(){
	var gleft=(n) ? eval(this.css.top):eval(this.css.pixelTop);
	return gleft;
}
//The functions for showing and hiding
function b_showIt(){
	this.css.visibility="visible"
}
function b_hideIt(){
	this.css.visibility="hidden"
}
/********************************************************************************
Checking if the page is scrolled, if it is move the menu after
********************************************************************************/
function checkScrolled(){
	if(!oMenu.go)oMenu.css.top=eval(scrolled)+fromTop
	if(bw.ns4) setTimeout('checkScrolled()',30)
}
/********************************************************************************
Inits the page, makes the menu object, moves it to the right place, 
show it..
********************************************************************************/
function menuBarInit(){
	oSub=new Array()
	oTop=new Array()
	for(i=0;i<numberOfMenus;i++){
		oTop[i]=new makeMenuBar('divTop'+i,'divBg')
		oSub[i]=new makeMenuBar('divSub'+i,'divBg.document.divTop'+i,1)
		oSub[i].evnt.onmouseout=evOut;
	}
	//Moving menuBar
	oMenu=new makeMenuBar('divBg')
	scrolled=bw.ns4?"window.pageYOffset":bw.ns5?"0":"document.body.scrollTop"
	oMenu.css.top=eval(scrolled)+fromTop
	oMenu.css.visibility='visible'
	if(moveOnScroll) bw.dom || bw.ie4?window.onscroll=checkScrolled:checkScrolled();

}

/********************************************************************************
Shows and hides the submenus
********************************************************************************/

function evOut(){
	if(bw.ie4 || bw.dom)this.style.visibility='hidden'
	else if(bw.ns4) this.visibility='hidden'
}
//Canceling event bubbling in ie
function ieShow(num){
	if(bw.ie4 || bw.dom){
		oSub[num].showIt()
		window.event.cancelBubble=true
	}
}
function extract(num){
	if(hideAll){
		for(i=0;i<oSub.length;i++){
			if(num!=i) oSub[i].hideIt()
		}
	}
	oSub[num].showIt();
}
onload=menuBarInit;