Please help, Javascript for flash 9 detection advice.

If inserted in the header.php in <?php wp_head(); ?> would this be the correct scripting to detect the flash player version is of 9 if so, what prompts the mto goto the correct version download?

<script>
function getFlashVersion(){
// ie
try {
try {
// avoid fp6 minor version lookup issues
// see: http://blog.deconcept.com/2006/01/11/getvariable-setvariable-crash-internet-explorer-flash-6/
var axo = new ActiveXObject(‘ShockwaveFlash.ShockwaveFlash.6’);
try { axo.AllowScriptAccess = ‘always’; }
catch(e) { return ‘6,0,0’; }
} catch(e) {}
return new ActiveXObject(‘ShockwaveFlash.ShockwaveFlash’).GetVariable(‘$version’).replace(/\D+/g, ‘,’).match(/^,?(.+),?$/)[1];
// other browsers
} catch(e) {
try {
if(navigator.mimeTypes[“application/x-shockwave-flash”].enabledPlugin){
return (navigator.plugins[“Shockwave Flash 2.0”] || navigator.plugins[“Shockwave Flash”]).description.replace(/\D+/g, “,”).match(/^,?(.+),?$/)[1];
}
} catch(e) {}
}
return ‘0,0,0’;
}

var version = getFlashVersion().split(‘,’).shift();
if(version < 9){
alert(“Lower than 9”);
}else{
alert(“9 or higher”);
}
</script>

many thanks