var Browser = {
	a : navigator.userAgent.toLowerCase()
}
Browser = {
	ie : /*@cc_on true || @*/ false,
	ie6 : Browser.a.indexOf('msie 6') != -1,
	ie7 : Browser.a.indexOf('msie 7') != -1,
	moz : Browser.a.indexOf('mozilla/5') != -1,
	opera : !!window.opera,
	safari : Browser.a.indexOf('safari') != -1,
	safari3 : Browser.a.indexOf('applewebkit/5') != -1,
	mac : Browser.a.indexOf('mac') != -1
}
function addStylesheet(href, media) {
	document.getElementsByTagName("head")[0].appendChild(createElement('link', {
		'rel': 'stylesheet',
		'type': 'text/css',
		'media': media || 'screen, projection',
		'href': href
	}));
}
function createElement(name, attrs, doc, xmlns) {
	var doc = doc || document;
	var elm;
	if(doc.createElementNS)
		elm = doc.createElementNS(xmlns || "http://www.w3.org/1999/xhtml", name);
	else
		elm = doc.createElement(name);
	if(attrs)
		for(attr in attrs)
			elm.setAttribute(attr, attrs[attr]);
	return elm;
}
/* ===== Firefox ===== */
 
// Select Firefox 
if (jQuery.browser.mozilla) {
    // do sth.
}
 
// Select Firefox 1.5.x to 2.x
if (jQuery.browser.mozilla && jQuery.browser.version.substr(0, 3) == '1.8') {
    // do sth.
}
 
// Select Firefox under 3.x
if (jQuery.browser.mozilla && jQuery.browser.version < '1.9') {
    // do sth.
}
 
// Select Firefox 3.0.x and above
if (jQuery.browser.mozilla && jQuery.browser.version.substr(0, 3) == '1.9') {
    // do sth.
}
 
 
// Select just Firefox 2.0.x
if (jQuery.browser.mozilla && jQuery.browser.version == '1.8.1') {
    // do sth.
}
 
// Select just Firefox 3.0.x
if (jQuery.browser.mozilla && jQuery.browser.version == '1.9') {
    // do sth.
}
 
// Select just Firefox 3.5.x
if (jQuery.browser.mozilla && jQuery.browser.version == '1.9.1') {
    // do sth.
}
 
// Select just Firefox 3.6.x
if (jQuery.browser.mozilla && jQuery.browser.version == '1.9.2') {
    // do sth.
}
 
 
/* ===== Internet Explorer ===== */
 
// Select Internet Explorer
if (jQuery.browser.msie) {
    // do sth.
}
 
// Select Internet Explorer above 6
if (jQuery.browser.msie && jQuery.browser.version > 6) {
    // do sth.
}
 
// Select Internet Explorer 7 and below
if (jQuery.browser.msie && jQuery.browser.version <= 7) {
    // do sth.
}
 
// Select just Internet Explorer 6
if (jQuery.browser.msie && jQuery.browser.version == '6.0') {
    // do sth.
}
 
// Select just Internet Explorer 7
if (jQuery.browser.msie && jQuery.browser.version == '7.0') {
    // do sth.
}
 
 
// Select just Internet Explorer 8
if (jQuery.browser.msie && jQuery.browser.version == '8.0') {
    // do sth.
}
 
 
/* ===== Safari / Chrome ===== */
 
// Select Safari / Chrome
if (jQuery.browser.safari) {
    // do sth.
}
 
// Select Safari 3
if (jQuery.browser.safari && (navigator.appVersion.indexOf('3.') != -1)) {
    // do sth.
}
 
// Select Safari 4
if (jQuery.browser.safari && (navigator.appVersion.indexOf('4.') != -1)) {
    // do sth.
}
 
// Select Chrome 1
if (jQuery.browser.safari && (navigator.appVersion.indexOf('1.') != -1)) {
    // do sth.
}
 
// Select Chrome 3
if (jQuery.browser.safari && (navigator.appVersion.indexOf('3.') != -1)) {
    // do sth.
}
 
 
/* ===== Opera ===== */
 
// Select Opera
if (jQuery.browser.opera) {
    // do sth.
}
 
// Select Opera 9.5 and above
if (jQuery.browser.opera && jQuery.browser.version >= '9.5') {
    // do sth.
}
 
// Select just Opera 9.5
if (jQuery.browser.opera && jQuery.browser.version == '9.5') {
    // do sth.
}
 
// Select just Opera 10
// Note: Opera 10's user agent looks like Opera/9.80 [...] Version/10.00
if (jQuery.browser.opera && jQuery.browser.version == '9.8') {
    // do sth.
}