Check whether the Alexa toolbar is installed

To identify this problem, you can only use the webpage script and then send the value to the server when the user logs on.
After the Alexa toolbar is installed, AlxTB1.dll and AlxRes are generated in the system directory. dll files. alxRes. dll files contain a large amount of HTML and JavaScript code. They exist in AlxRes as resources. in the dll file, you can use res: // AlxRes. dll/CHTML/about.html to access these resources. Open the DLL in the editor and you can see all the scripts. We create an HTML page and insert a <script> between <Script language = "javascript" src = "res: // AlxRes. dll/SCRIPT/dsn. class. js"> </script>
Dsn. class. js is one of the script resources in AlxRes. dll. Now we can find a function in this resource as long as it can run. I find a simple one:
Function aborted ()
{
Return;
}
This method is relatively simple and is not prone to errors. This is easy to handle. You need to determine whether the alexa toolbar is installed on the user end and write a script:

<Script language = "javascript" src = "res: // AlxRes. dll/SCRIPT/dsn. class. js"> </script>
<Script language = "javascript">
Function doTryAlexa ()
{
Try
{
Aborted ();
Return 1;
}
Catch (e)
{
Return 0;
}
}
</Script>

... Let's test it below:

<Input type = "button" value = "tryAlexa" onclick = "alert (doTryAlexa ()">
If the installation is complete, prompt 1. If the installation is not complete, prompt 2.