function preview(imagem,titulo)
{
//Modulo de Preview
var altura=window.screen.height;
var largura=window.screen.width;
var topo=(altura/2)-192;
var esquerda=(largura/2)-262;
var definicoes='toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width=524,height=384,top='+ topo + ',left=' + esquerda;
winpopup = window.open('','preview',definicoes);
winpopup.document.write('\n\n' + titulo + '\n');
winpopup.document.write('');
winpopup.document.write('');
winpopup.document.write(' ');
winpopup.document.write('  | ');
winpopup.document.write('  | ');
winpopup.document.write('  | ');
winpopup.document.write('
\n \n  | \n
');
winpopup.document.write(' \n  | \n
');
winpopup.document.write('
\n\n');
winpopup.document.close();
winpopup.focus();
}