var win= null;

function popup(page,nome,largo,alto) {
	OpenWin = this.open(page,nome,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width="+largo+",height="+alto);
}

function centra_popup(mypage,myname,w,h) {
	var winl = (screen.width-w)/2;
	var wint = (screen.height-h)/2;
	settings='height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars=yes,toolbar=no'
	win=window.open(mypage,myname,settings)
	if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}

function popost(url, wname, width, height) {
	window.open(url, wname, "height=" + height + ",width=" + width + "location = 0, status = 1, resizable = 1, scrollbars=1, toolbar = 0");
	return true;
}