// JavaScript Document
function slider()
{
	var anchoImagen = 710;
	var currentCol = 0;
	var folioChange = new Fx.Tween('folio', {duration:2000});
	var columns = $$('div.col');
	var x;
	
	setInterval(function ()
		{
			if(currentCol < columns.length-1)	currentCol ++;
			else currentCol = 0;
			x = (currentCol*-anchoImagen);
			folioChange.start('left',x);
		}, 7000);
	
	/*
	//Sin intervalos de tiempo
	function ()
	{
		if(currentCol < columns.length-1)	currentCol ++;
		else currentCol = 0;
		x = (currentCol*-anchoImagen);
		folioChange.start('left',x);
	}*/
	
	/*boton anterior*/
	$('slprev').addEvent('click', function(){
		if(currentCol>0) currentCol --;

		x = (currentCol*-anchoImagen);
		folioChange.start('left',x);
	});

	/*boton siguiente*/
	$('slnext').addEvent('click', function(){
		if(currentCol<columns.length-1) currentCol ++;
		else currentCol = 0;

		x = (currentCol*-anchoImagen);
		folioChange.start('left',x);
	});	
}