Forums Scripts & Popups Commands to Close a window/application needed

Greetings,

I have a timer set to open mIRC and a alias task set to access a website.

alias performtask {
url ]http://somesite.com[/url]
}

1) After performing that alias task, how do I automatically close that internet window/browser application?

2) Is there a mIRC command to minimize the browser window produced via the command url http://somesite.com when it is first activated?

Thanks to each for your time and consideration,

MDA