To get the browser name in flash , let say in click of a button and display it in a text field
btnMC.addEventListener(MouseEvent.CLICK,btnClicked){
var browser:String = getBrowserName();
txtField.text = browser;
}
function getBrowerName():String{
var browser:String;
var browserAgent:String = ExternalInterface.call(“function getBrowser(){return navigator.userAgent;}”);
if(browserAgent != null && browserAgent.indexOf(“Firefox”) >= 0) {
browser = “Firefox”;
}
else if(browserAgent != null && browserAgent.indexOf(“Safari”) >= 0){
browser = “Safari”;
}
else if(browserAgent != null && browserAgent.indexOf(“MSIE”) >= 0){
browser = “IE”;
}
else if(browserAgent != null && browserAgent.indexOf(“Opera”) >= 0){
browser = “Opera”;
}
else {
browser = “Undefined”;
}
return (browser);
}
njoy 
………..