Proxied Browsing

This script allows you to browse to one web page proxied. I would like any suggestions on how to make all new pages proxied but this is it for now. You must click on the safari window for it to work. Just so you know I am a new scripter so please don’t critique too much.

set moourl to text returned of (display dialog "Enter URL" default answer "google.com" buttons {"Ok"} default button 1)
tell application "Safari"
	activate
	make new document
end tell
delay 2
tell application "System Events"
	tell process "Safari"
		keystroke tab
		keystroke tab
		keystroke tab
		delay 0.5
		keystroke "http://74.125.155.132/search?client=safari&rls=en&q=cache:"
		delay 0.5
		keystroke moourl
		keystroke return
	end tell
end tell