function popup(dochtml, largura, altura, scroll) {
	if(navigator.appName == "Netscape") {
		sec = window.open(dochtml,'_blank','scrollbars=' + scroll + ',toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,copyhistory=no,height='+ altura +',width='+ largura +',top=23,left=8');
		window.sec.focus();
	}
	else {
		window.open(dochtml,'_blank','scrollbars=' + scroll + ',toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=no,copyhistory=no,height=' + altura + ',width=' + largura + ',top=23,left=8');
	}
}