var agent 	= navigator.userAgent.toLowerCase();
	var major	= parseInt(navigator.appVersion);

	// Resultado para o Chrome
	//mozilla/5.0 (windows; u; windows nt 5.1; en-us) applewebkit/530.5 (khtml, like gecko) chrome/2.0.172.33 safari/530.5

	this.isIE7		= ((agent.indexOf('msie') != -1) && (agent.indexOf('7.0') != -1));
	this.isNN		= ( agent.indexOf('netscape') != -1);
	this.isIE		= ((agent.indexOf('msie') != -1) && (agent.indexOf('6.0') != -1));
	this.isFirefox	= ( agent.indexOf('firefox') != -1);
	this.isOpera	= ( agent.indexOf('opera') != -1);
	this.isChrome	= ( agent.indexOf('chrome') != -1);