Disable Access-Control-Allow-Origin from Apache or htaccess?

in my local machine when I try to send request via ajax using cross domains the request doesn't complete I added this options to .htaccess file Header always set Access-Control-Allow-Origin "Note when I sent the request on my cPanel hosting the response was this message Failed to load ' is therefore not allowed access. which mean the Access-Control-Allow-Origin has been set somewhere else