#NoEnv
SendMode Input
SetWorkingDir %A_ScriptDir%
SetTitleMatchMode 3

InputBox URL, Site address, Enter URL to site you want to block.
sleep 500
WinActivate Site address
if ErrorLevel
{
	ExitApp
}
else
{
	FileGetAttrib RO, %A_WinDir%\system32\drivers\etc\hosts
	IfInString RO, R
	{
		FileSetAttrib -R, %A_WinDir%\system32\drivers\etc\hosts
		FileAppend 127.0.0.1	%URL%`n, %A_WinDir%\system32\drivers\etc\hosts
		FileSetAttrib +R, %A_WinDir%\system32\drivers\etc\hosts
	}
	else
	{
		FileAppend 127.0.0.1	%URL%`n, %A_WinDir%\system32\drivers\etc\hosts
	}
	ExitApp
}