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This Opera Extension will allow you to execute custom JavaScript code on any site and to store the comments for pages. JavaScript code is executed when the page loads, and can contain jQuery selectors.

Custom JavaScript code can be executed for different groups of pages:
- For all sites
- For all subdomains
- For a specific domain
- For a specific page

The extension allows to execute custom JavaScript code on any site and to store the comments for pages.
JavaScript code is executed when the page loads, and can contain jQuery selectors.

Custom JavaScript code can be executed for different groups of pages:
1. For all sites
2. For all subdomains
3. For a specific domain
4. For a specific page

If you go to the page "homepage" fill in the following Script and select "enabled"
1. For all sites: alert('script for all sites');
2. For all subdomains (*.google.com): alert('script on google.com');
3. For a specific domain (www.google.com): alert('script on www.google.com');
4. For a specific page (www.google.com/imghp): alert('scrip for images on google.com');
After each action you have press "Save" button

When you visit "homepage" page 4 messages will be displayed in turns:
script for all sites, script on google.com, script on www.google.com, script for images on google.com

When you visit "homepage" page 2 messages will be displayed in turns:
script for all sites, script on google.com

When you visit "homepage" page 1 message will be displayed:
script for all sites

If you set the script to all sites in line:
setTimeout( "$('*').each(function(){
if ($(this).css('z-index')>100)
$(this).remove();
}); ",1000);
One second after loading any page, script will remove all the layers with z-index more than 100.
It is easy to remove the advertising layers