var gblOpacityIn  = 100;
var gblOpacityOut = 0 ;
var count=50
var count2=0
var pausa=true;
//setOpacity(document.getElementById('bg2'), 0)

function cambia() { 
	if (pausa){
		setTimeout("cambia()",3000);
		pausa=false;
	} else {
		if (count>1){
			gblOpacityIn=gblOpacityIn-2;
			setOpacity(document.getElementById('img1'), gblOpacityIn)
			gblOpacityOut=gblOpacityOut+2;
			setOpacity(document.getElementById('img2'), gblOpacityOut)
			count--;
			if (gblOpacityOut>95) {
				pausa=true;
				setOpacity(document.getElementById('img1'), 0)
				setOpacity(document.getElementById('img2'), 100)
			}
			setTimeout("cambia()",100);
		} else if(count2<50){
			gblOpacityIn=gblOpacityIn+2;
			setOpacity(document.getElementById('img1'), gblOpacityIn)
			gblOpacityOut=gblOpacityOut-2;
			setOpacity(document.getElementById('img2'), gblOpacityOut)
			count2++;
			//alert(gblOpacityIn)
			setTimeout("cambia()",100);
		} else {
			return
		}
	
	}
}

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;
  }


// JavaScript Document