var flash_ver_detected = -1;
var is_mac = (navigator.appVersion.toLowerCase().indexOf('mac') != -1);

if (navigator.appName == 'Netscape')  {
    if (navigator.plugins["Shockwave Flash 2.0"]) flash_ver_detected = 2;
    else if (navigator.plugins["Shockwave Flash"]) {
		var flash_plugin_desc = navigator.plugins["Shockwave Flash"].description;
		var flash_plugin_ver_pos  = flash_plugin_desc.lastIndexOf('.');
		flash_ver_detected = parseInt(flash_plugin_desc.substring(flash_plugin_ver_pos - 1, flash_plugin_ver_pos));
	}
}