var NS3=((navigator.appName=='Netscape')&&parseInt(navigator.appVersion)>=3&&parseInt(navigator.appVersion)<4);
var NS4=((navigator.appName=="Netscape") && (navigator.appVersion.substr(0,1)<5));
var IE=(document.all)?1:0;
var NS4=((navigator.appName=="Netscape") && (navigator.appVersion.substr(0,1)<5));
var IE4=(document.all&&!document.getElementById)?1:0;
var IE5=(document.all&&document.getElementById)?1:0;
var NS6=(document.getElementById&&!document.all)?1:0;
var DHTML=(IE||NS4||NS6)?1:0;
var DOM=(IE5||NS6)?1:0;
var MAC=(navigator.userAgent.indexOf('Mac')!=-1)?1:0;
var IEMAC=(MAC&&IE)?1:0;
var IE4MAC=(IEMAC&&(navigator.appVersion.indexOf('4.',4)!=-1))?1:0;
var IE5MAC=(IEMAC&&(navigator.appVersion.indexOf('5.')!=-1))?1:0;

function abrirSite(url) {
	var x = screen.width-10;
	var y = screen.height-60;

	if (MAC) {	// Ajustar para MacIntosh.
		if (IEMAC) { // explorer
			x = x+20;
			y = y+20;
		} else { // netscape
			x = x-1;
			y = y+12;
		}
	}
	else if (NS6) {
		x = x+2;
		y = y+4;
	}
	var id = 'popup_'+(Math.floor(Math.random(10)*10000000));
	var option = "toolbar=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width="+x+",height="+y+",left=0,ScreenX=0,top=0,ScreenY=0";
	window.open(url, id, option);
}