function abrejanela(arquivo,nome,width,height)
{
if(!width) width='678';
if(!height) height='489';
window.open(arquivo,nome,'toolbar=no,location=no, directories=no,status=no,menubar=no,resizable=no,copyhistory=no,scrollbars=no,width=' + width + ',height=' + height + ',left=10,top=10,screenX=10,screenY=10');
}