// Verifica compatibilidad del browser.
function verifyCompatibleBrowser(){ 
    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 verifyCompatibleBrowser() 
var speed=80 
var loop, timer 

// Construye Ojetos de scrolling
function ConstructObject(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.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight 
    this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight 
    this.up=MoveAreaUp;this.down=MoveAreaDown; 
    this.MoveArea=MoveArea; this.x; this.y; 
    this.obj = obj + "Object" 
    eval(this.obj + "=this") 
    return this 
} 

//Mueve Areas - Scrolling
function MoveArea(x,y){ 
    this.x=x;this.y=y 
    this.css.left=this.x 
    this.css.top=this.y 
} 

//Scroll Down
function MoveAreaDown(move){ 
	if(this.y>-this.scrollHeight+objContainer.clipHeight){ 
    this.MoveArea(0,this.y-move) 
    if(loop) setTimeout(this.obj+".down("+move+")",speed) 
	} 
} 
//Scroll Up
function MoveAreaUp(move){ 
	if(this.y<0){ 
    this.MoveArea(0,this.y-move) 
    if(loop) setTimeout(this.obj+".up("+move+")",speed) 
	} 
} 

//Ejecutar Scroll
function PerformScroll(speed){ 
	if(initialised){ 
		loop=true; 
		if(speed>0) objScroller.down(speed) 
		else objScroller.up(speed) 
	} 
} 

//Fin Scroll
function CeaseScroll(){ 
    loop=false 
    if(timer) clearTimeout(timer) 
} 
var initialised; 
var objScroller;
var objContainer;
//Inicalizar area Scrollable
function InitialiseScrollableArea(){
	if (cntlayers > 0) {
		for (i=0; i < cntlayers; i++) {
			layers[i][3]=new ConstructObject(layers[i][2]) ;
			layers[i][1]=new ConstructObject(layers[i][0],layers[i][2]);
			layers[i][1].MoveArea(0,0);
		}
	    objContainer=layers[0][3];
    	objContainer.css.visibility='visible';
	    initialised=true; 
		objScroller=layers[0][1];
	}
} 



//Get Objets for Scroll
function getObj(name) {
    if (document.getElementById) {
        return document.getElementById(name).style;
    } else
    if (document.all) {
        return document.all[name].style;
    } else
    if (document.layers) {
        return document.layers[name];
    }
}

//If rezise --> reload 
function rezizePage() {  //reloads the window if Nav4 resized
	location.reload();
}