function pregarga(imagefile)
	{ 
	imagen = new Image(); 
	imagen.src = imagefile; 
	} 


function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		for(i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = document.getElementById(id).style; 
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}


function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function cambiaimg(titulo,descripcion,abrir_nueva_pag,imagefile,imagefile2, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	//alert(descripcion);
	//CAMBIAR HREF
	//document.getElementById('linkA').href = descripcion;
	//set the current image as background
	//document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	//changeOpac(0, 'blendimage');
	for(i = 100; i >= 0; i--) {
		setTimeout("changeOpac(" + i + ",'blendimage')",(timer * (speed/2)));
		timer++;
		}
	
	//make new image
	setTimeout("cambiaimg2('" + imagefile + "', '" + descripcion + "', '" + abrir_nueva_pag + "')",(timer * (speed/2)));

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'blendimage')",(timer * speed));
		timer++;
		
	//myLightbox.updateImageList();
	}
}

function cambiaimg2(imagefile, descripcion, abrir_nueva_pag) 
	{
	document.getElementById('blendimage').src = imagefile;
	document.getElementById('linkdani').href = descripcion;
	document.getElementById('linkdani').target = abrir_nueva_pag;
	}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}
                                
// funciones propias
function muestra_simple(obj){
								document.getElementById(obj).style.display = "block";
}
function oculta_simple(obj){
								document.getElementById(obj).style.display = "none";
}

function pinchaLogo(){
	location.href="index.php";
}