function detect_chrome(){

var browser=navigator.appVersion;
browser = browser.toLowerCase();

var pos=browser.indexOf("chrome");
if (pos!=-1){
	//chrome
	//alert('chrome');
	return true;
}else{
	//not chrome
	return false;
}

}



//detect any version of FireFox
function detect_FF(){

var browser=navigator.userAgent;
browser = browser.toLowerCase();

var pos=browser.indexOf("firefox");
if (pos!=-1){
	//FF
	return true;
}else{
	//not FF
	return false;
}

}