var alpha_intervalo= 5
var alpha_int = 20


function preloadImages() {
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function alpha(img){
	obj= img
	alpha_ciclo= setTimeout("walpha(obj)", alpha_intervalo)
}

function walpha(img){
	obj= img
	if(obj.filters.alpha.opacity > 1){
		obj.filters.alpha.opacity -= alpha_int;
		alpha_ciclo= setTimeout("walpha(obj)", alpha_intervalo)
	}
	else if(window.alpha_ciclo) clearInterval(alpha_ciclo)
}

function restaura_alpha(img){
	var obj= img
	obj.filters.alpha.opacity= 100
	if(window.alpha_ciclo) clearInterval(alpha_ciclo)
}