var color = 0;
var suma = 10;
function aparecer(){
var obj = document.getElementById('buscadores');
obj.style.display = "block";
color += suma;
if (!(color>=110)){
obj.style.filter = 'alpha(opacity='+color+')';
			 obj.style.opacity = color /100;
			 obj.style.MozOpacity = color /100;
			 obj.style.KHTMLOpacity = color /100;
		window.setTimeout("aparecer();", 100);
}
}