function envia(id) 
{window.open('envia.php?id='+id,'Materia','width=450, height=230, top=100, left=400, menubar=no, status=no, toolbar=no, scrollbars=no, resizable=no');}
function imprimir(id) 
{window.open("artigo_imprimir.php?id=" + id,"Imprimir","width=700, height=600, top=100, left=400, toolbars=no, status=no, menubar=no, scrollbars=yes, resizable=no");}
function enviar(idx) 
{window.open("aviso.php?idx=" + idx,"Enviar","width=480, height=600, top=100, left=400, toolbars=no, status=no, menubar=no, scrollbars=yes, resizable=no");}