function NNCheck( version ){
	if (navigator.appName == "Netscape" &&
		parseInt(navigator.appVersion) >= version){
		return true;
	}
	else{
		return false;
	}
}

function IECheck( version ) {

	var ua = navigator.userAgent ;
	var msie = ua.indexOf ( "MSIE" ) ;

	if (( msie >= 0 ) && ( version <= parseInt(ua.substring(msie+5, ua.indexOf( ".", msie ))) )){
		return true;
	}
	else{
		return false;
	}
}