<html>
<head>
<style>
#box{
display:none;
}
</style>
<script>
function mostrar(){
document.getElement ById("box").style.display='block';
}
</script>
</head>
<body>
<center>
<div id="box">box oculto</div>
<input type="button" value="clicar" onClick="mostrar();">
</center>
</body>
</html> |
