function centraliza(largura,altura){
	window.moveTo((window.screen.width-largura)/2,(window.screen.height-altura)/2);
}
function abreJanela(arquivo,nome,barra,largura,altura) {
	window.open(arquivo,nome,"resizable=no,toolbar=no,status=no,menubar=no,scrollbars="+barra+",width="+largura+",height="+altura);
}
var css_browser_selector = function() {
	var 
		ua = navigator.userAgent.toLowerCase(),
		is = function(t){ return ua.indexOf(t) != -1; },
		h = document.getElementsByTagName('html')[0],
		b = (!(/opera|webtv/i.test(ua)) && /msie (\d)/.test(ua)) ? ((is('mac') ? 'ieMac ' : '') + 'ie ie' + RegExp.$1)
			: is('gecko/') ? 'gecko' : is('opera') ? 'opera' : is('konqueror') ? 'konqueror' : is('applewebkit/') ? 'webkit safari' : is('mozilla/') ? 'gecko' : '',
		os = (is('x11') || is('linux')) ? ' linux' : is('mac') ? ' mac' : is('win') ? ' win' : '';
	var c = b+os+' js';
	h.className += h.className?' '+c:c;
}();