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

function desbus(){
var obj2 = document.getElementById('buscr');	
opaci -= suma;
if (!(opaci <=-10)){
	obj2.style.filter = 'alpha(opacity='+opaci+')';
			 obj2.style.opacity = opaci /100;
			 obj2.style.MozOpacity = opaci /100;
			 obj2.style.KHTMLOpacity = opaci /100;
		window.setTimeout ("desbus();", 100);
}
if (opaci == 0){
obj2.style.display ='none';
}
}

function apades(){
	if (opaci <= 0){
	apabus();
	}
	else{
	desbus();
	
	}
	
}

var opaci2 = 0;
var suma2 = 	20;
function apar() {
var obj3 = document.getElementById('novisible');

opaci2 += suma2;
		
	if (!(opaci2 >= 120)) {
			obj3.style.filter = 'alpha(opacity='+opaci2+')';
			 obj3.style.opacity = opaci2 /100;
			 obj3.style.MozOpacity = opaci2 /100;
			 obj3.style.KHTMLOpacity = opaci2 /100;
		window.setTimeout ("apar();", 30);
		}
}

function desr(){
var obj4 = document.getElementById('novisible');	
opaci2 -= suma2;
if (!(opaci2 <=-20)){
	obj4.style.filter = 'alpha(opacity='+opaci2+')';
			 obj4.style.opacity = opaci2 /100;
			 obj4.style.MozOpacity = opaci2 /100;
			 obj4.style.KHTMLOpacity = opaci2 /100;
		window.setTimeout ("desr();", 30);
}

}