var curpage=0;
var timer=null;
var imagesWidth=null;
var imagesHeight=null;
var slideHeight=0;
var stopped = false;
var numpages = 0;
var arraySlides;
var obj;

var alturaSlider = 900; //permite textos más largos
var botoneraLeft = 530; //posición horizontal de la botonera
var botoneraTop = 540; //posición vertical de la botonera

function fnc_next()
{
	if (curpage < numpages-1)
	{

		obj=arraySlides[curpage];
		obj.style.visibility = "hidden";
		obj.style.display = "none";
		obj.style.height = "1px";
	
		curpage++;
	
		obj=arraySlides[curpage];
		obj.style.visibility = "visible";
		obj.style.display = "block";
		obj.style.height = slideHeight + "px";
	
		if(!stopped)
		{
			clearTimeout(timer);
		}

	}


}

function fnc_prev()
{
	if (curpage>0){
		if (curpage>numpages)	curpage = 0;
	
		obj= arraySlides[curpage];
	
		if(obj)
		{
			obj.style.visibility = "hidden";
			obj.style.display = "none";
			obj.style.height = "1px";
		}
		
		curpage--;
	
		obj=arraySlides[curpage];
		if(obj)
		{
			obj.style.visibility = "visible";
			obj.style.display = "block";
			obj.style.height = slideHeight + "px";
		}
	
		if(!stopped)
		{
			clearTimeout(timer);
		}
	}
}

function stopstart(img) 
{
	if (stopped) {
		img.src="images/botones/"+img.id+".gif";
		img.onmouseover="sgppnov(this);";
		img.onmouseout="sgppnou(this);";
	} else {
		img.src="images/botones/"+img.id+"2.gif";
		img.onmouseover="";
		img.onmouseout="";
		stop();
	}
}

function stop() 
{
	if (!(stopped)) 
	{
		clearTimeout(timer);
		stopped=true;
	}
}
function start() 
{
	timer=setTimeout('fnc_next()',10000);
	stopped=false;
}

function firsthideImgs()
{
	arraySlides = document.getElementsByName("sld");

	numpages = arraySlides.length;

	for (i=0;i <= numpages;i++)
	{
		var obj=arraySlides[i];
		if(obj)
		{
			if(i==0) 
			{
				imagesWidth	 = document.getElementById('im').width;
				imagesHeight = document.getElementById('im').height;
			}
			
			slideHeight = imagesHeight + ((muestraTitulo==0)?88:0);
			obj.style.visibility="hidden";
			obj.style.display = "none";
			obj.style.height = "1px";
			obj.style.overflow ="hidden";
			obj.style.top = "0px";
			obj.style.position = "relative";
			obj.style.border = "0px solid";
			obj.style.zIndex = 1;
		}
	}

	curpage = 0;
	var firstSlide = arraySlides[0];
	if(firstSlide)
	{
		firstSlide.style.visibility = "visible";
		firstSlide.style.display = "block";
		firstSlide.style.height = imagesHeight + "px";
		slideHeight = imagesHeight;
	}
}


function firsthide()
{
	

	arraySlides = document.getElementsByName("sld");
	numpages = arraySlides.length;

	for (i=0;i < numpages ;  i ++)
	{	

		obj=arraySlides[i];
		if(obj)
		{
			if(i==0) 
			{
				imagesWidth	 = document.getElementById('im').width;
				imagesHeight = document.getElementById('im').height;
			}

			slideHeight = imagesHeight + alturaSlider;
			obj.style.visibility="hidden";
			obj.style.display = "none";
			obj.style.height = "1px";
			obj.style.overflow ="hidden";
			obj.style.top = "0px";
			obj.style.position = "relative";
			obj.style.border = "0px solid";
			obj.style.zIndex = 1;
		}
	}

	if (numpages > 1)
	{
		var botonera=document.getElementById('botones');
		if(botonera)
		{
			botonera.style.visibility = "visible";
			botonera.style.display = "block";
			botonera.style.zIndex = "5";
		}
	}

	curpage = 0;
	var firstSlide = arraySlides[0];
	if(firstSlide)
	{
		firstSlide.style.visibility = "visible";
		firstSlide.style.display = "block";
		firstSlide.style.height = slideHeight + "px";
		start();
}


}

function sgppnov(img)
{
	img.src='images/botones/'+img.id+'2.gif';
}
function sgppnou(img)
{
	img.src='images/botones/'+img.id+'.gif';
}