userAgent = navigator.userAgent.toLowerCase();

showFlashScript=false;

if (userAgent.indexOf("googlebot")>=0){
    showFlashScript=true;

}else if (userAgent.indexOf("yahoo! slurp")>=0){
    showFlashScript=true; 

}else if (userAgent.indexOf("msnbot")>=0){
    showFlashScript=true;

}else if (userAgent.indexOf("ask jeeves")>=0){
    showFlashScript=true;
}