Hi,

you can use the api below to check the upload file name before upload and block it there.

//Fires when files are selected.

function CuteWebUI_AjaxUploader_OnSelect(files)

{

    //change the files array would take no effect.

    var name=files[0].FileName;

    var size=files[0].FileSize // (or -1)

    //return false to cancel it..

}

regards,

Ken