var header = {};

header.show = function(){
	document.getElementById('header.banner').style.display = 'block';
}
			
header.banner = function(){
	var j,d="",l="",m="",p="",q="",z="",KW_ARI= new Array()
	KW_ARI[KW_ARI.length]='imagens/banner1.jpg?&width=752&height=75';
	KW_ARI[KW_ARI.length]='imagens/banner2.jpg?&width=752&height=75';
	KW_ARI[KW_ARI.length]='imagens/banner3.jpg?&width=752&height=75';

	j=parseInt(Math.random()*KW_ARI.length);
	j=(isNaN(j))?0:j;

	path = KW_ARI[j];
	var arrayimg = path.split('?');
	var parametros = arrayimg[1].split('&');
	
	nomeimg = arrayimg[0];
	width = parametros[1].split('=');
	width = width[1];
	height = parametros[2].split('=');
	height = height[1];

	document.getElementById('header.banner').src= nomeimg;
	document.getElementById('header.banner').width= width;
	document.getElementById('header.banner').height= height;
}