//by NETFINITIVA S.L.


var Contador = 1;
var Posicion = 1;

var ImgArr = new Array();



function BajaOpacity(opacity) {
	
	var object = document.getElementById(GallID + "img1").style;
	var FFOpac;
	opacity = opacity - Velocidad;
	
	if(opacity > 0){
		
		

		if (document.getElementById(GallID + "img1")){
			
			FFOpac = opacity / 100;
			
			document.getElementById(GallID + "img1").setAttribute("style", "opacity:"+FFOpac+";");
			if (document.getElementById(GallID + "img1").style.setAttribute){
				document.getElementById(GallID + "img1").style.setAttribute("filter", "alpha(opacity="+opacity+");");
			}
		}
		
		setTimeout('BajaOpacity('+opacity+');',10);
	}
	else{
		Posicion = 1;
		NextPhoto();
	}
}


function SubeOpacity(opacity) {
	
	var object = document.getElementById(GallID + "img1").style;
	var FFOpac;
	opacity = opacity + Velocidad;
	


	if(opacity < 100){
		
		if (document.getElementById(GallID + "img1")){
			
			FFOpac = opacity / 100;
			
			document.getElementById(GallID + "img1").setAttribute("style", "opacity:"+FFOpac+";");
			if (document.getElementById(GallID + "img1").style.setAttribute){
				document.getElementById(GallID + "img1").style.setAttribute("filter", "alpha(opacity="+opacity+");");
			}
		}
		
		setTimeout('SubeOpacity('+opacity+');',10);
	}
	else{
		Posicion = 2;
		NextPhoto();
	}
}



function NextPhoto(){

	
	if(Posicion == 1){
		document.getElementById(GallID + "img1Image").src = "../images/contenidos/" + ImgArr[Contador];

		document.getElementById(GallID + "img1").setAttribute("style", "opacity:0;");
		
		if (document.getElementById(GallID + "img1").style.setAttribute){
			document.getElementById(GallID + "img1").style.setAttribute("filter", "alpha(opacity=0);");
		}
		setTimeout('SubeOpacity(0);',(Tiempo * 1000));
		
	}
	else{
		document.getElementById(GallID + "img2Image").src = "../images/contenidos/" + ImgArr[Contador];
		
		setTimeout('BajaOpacity(100);',(Tiempo * 1000));
	}

	Contador = Contador + 1;
	if(Contador == ImgArr.length){
		Contador = 0;
	}
	
}

function InitGall(){
 
	document.writeln('<style type="text/css">');
	document.writeln('#'+ GallID +'img1 {position:absolute; left:0px; top:0px; z-index:2;filter:alpha(opacity=0);-moz-opacity: 0; opacity: 0;}');
	document.writeln('#'+ GallID +'img2 {position:absolute; left:0px; top:0px; z-index:1;filter:alpha(opacity=100);-moz-opacity: 1; opacity: 1;}');
	document.writeln('</style>');

	
	document.writeln('<div style="position:relative; z-index:0;">');

	document.writeln('<div id="'+ GallID +'img1">');
	document.writeln('<img id="'+ GallID +'img1Image" src="" border="0">');
	document.writeln('</div>');
		document.writeln('<div id="'+ GallID +'img2">');
	document.writeln('<img id="'+ GallID +'img2Image" src="" border="0">');
	document.writeln('</div>');
	document.writeln('</div>');
	
	document.getElementById(GallID + "img1Image").src = "../images/contenidos/" + ImgArr[1];
	document.getElementById(GallID + "img2Image").src = "../images/contenidos/" + ImgArr[0];
	
	

	setTimeout('NextPhoto();',1000);

}