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()

timSpeed=50

contHeight=225

function makeScrollObj(obj,nest){
	nest=(!nest) ? '':'document.'+nest+'.'										
	this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;
    this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0;		
	this.height=bw.ns4?this.css.document.height:this.el.offsetHeight
	this.moveIt=moveIt; this.x; this.y;
	this.top=b_gettop										
	return this
}

function moveIt(x,y){
	this.x=x;this.y=y
	this.css.left=this.x
	this.css.top=this.y
}

function b_gettop(){
	var gleft=(bw.ns4 || bw.ns5) ? eval(this.css.top):eval(this.css.pixelTop);
	return gleft;
}

var altura=0;
var scrollTim;
var active=0;

function scroll(speed){
	clearTimeout(scrollTim)
	way=speed>0?1:0
	if((!way && oScroll[active].top()>-oScroll[active].height+contHeight) || (oScroll[active].top()<0 && way)){
		oScroll[active].css.top= oScroll[active].top()+speed;
		scrollTim=setTimeout("scroll("+speed+")",timSpeed)
	}
}

function noScroll(){
	clearTimeout(scrollTim)
}

function changeActive(num){
	oScroll[active].css.visibility='hidden'
	active=num
	oScroll[active].moveIt(0,0)
	oScroll[active].css.visibility='visible'
}

function scrollInit(){
	oScroll=new Array()
	oScroll[0]=new	makeScrollObj('divScroll1','divCont')
		
	oScroll[0].css.visibility='visible'
	oControl=new makeScrollObj('divControl')
	oControl.css.visibility='visible'
}