function initImage() {
	imageId = 'foto';
	image = document.getElementById(imageId);
	setOpacity(image, 0);
	image.style.visibility = "visible";
	fadeIn(imageId,0);
}
function fadeIn(objId,opacity) {
	if (document.getElementById) {
		obj = document.getElementById(objId);
		if (opacity <= 100) {
			setOpacity(obj, opacity);
			opacity += 10;
			window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);
		}
	}
}
function setOpacity(obj, opacity) {
	opacity = (opacity == 100)?99.999:opacity;
	// IE/Win
	obj.style.filter = "alpha(opacity:"+opacity+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = opacity/100;
	// Older Mozilla and Firefox
	obj.style.MozOpacity = opacity/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = opacity/100;
}

function Ampliar(foto,ancho,alto,visible)
{
  
  if (visible)
  { 
  document.getElementById("AmpliaFoto").src='Imagenes/Noticias/'+foto;
	 document.getElementById("AmpliaFoto").height=alto;
	 document.getElementById("AmpliaFoto").width=ancho;
	 document.getElementById("AmpliaFoto").style.visibility='visible'; 
	 }
  else
  { 
	 document.getElementById("AmpliaFoto").style.visibility='hidden';
  }
}

function getViewportWidth() {
    var helper;
    if (null == (helper = document.getElementById('styleSwapHelper'))) {
        var helper = document.createElement('div');
        helper.style.position = 'absolute';
        helper.style.margin = '0';
        helper.style.padding = '0';
        helper.style.right = '0';
        helper.style.width = '10px';
        document.getElementsByTagName('body')[0].appendChild(helper);
    }
    return helper.offsetLeft + 10;
}