diff --git a/plugin/instacode.vim b/plugin/instacode.vim
index 23b1a73..4114d04 100644
--- a/plugin/instacode.vim
+++ b/plugin/instacode.vim
@@ -14,36 +14,44 @@ let g:loaded_instacode = 1
 let s:save_cpo = &cpo
 set cpo&vim
 
-" function by StackOverflow user xolox
-" http://stackoverflow.com/a/6271254
-function! s:get_visual_selection()
-	" Why is this not a built-in Vim script function?!
-	let [lnum1, col1] = getpos("'<")[1:2]
-	let [lnum2, col2] = getpos("'>")[1:2]
-	let lines = getline(lnum1, lnum2)
-	let lines[-1] = lines[-1][: col2 - (&selection == 'inclusive' ? 1 : 2)]
-	let lines[0] = lines[0][col1 - 1:]
-	return join(lines, "\n")
+" Ripped directly from haskellmode.vim
+function! s:url_encode(string)
+	let pat  = '\([^[:alnum:]]\)'
+	let code = '\=printf("%%%02X",char2nr(submatch(1)))'
+	let url  = substitute(a:string,pat,code,'g')
+	return url
 endfunction
 
-function! Instacode()
-	if getpos("'<")[1] > 0
-python << endpython
-import vim, webbrowser, urllib
-code = vim.eval('s:get_visual_selection()')
-filetype = vim.eval('&ft')
-webbrowser.open('http://instacod.es/?post_code=' + urllib.quote_plus(code) + '&post_lang=' + urllib.quote_plus(filetype.title()))
-endpython
-	sleep 500m
-	redraw!
-	else 
-		echomsg "You need to visually select something first"
-	endif
+" Open URLs with the system's default application. Works for both local and
+" remote paths.
+function! s:open_url(url)
+	let url = shellescape(a:url)
+
+	if has('mac')
+		silent call system('open '.url)
+	elseif has('unix')
+		if executable('xdg-open')
+			silent call system('xdg-open '.url.' 2>&1 > /dev/null &')
+		else
+			echoerr 'You need to install xdg-open to be able to open urls'
+			return
+		end
+	elseif has('win32') || has('win64')
+		exe '!start rundll32 url.dll,FileProtocolHandler '.url
+	else
+		echoerr 'Don''t know how to open a URL on this system'
+		return
+	end
+endfunction
+
+function! Instacode(start_lineno, end_lineno)
+	let code = join(getbufline('%', a:start_lineno, a:end_lineno), "\n")
+	call s:open_url('http://instacod.es/?post_code='.s:url_encode(code).'&post_lang='.&ft)
 endfunction
 
-command Instacode :call Instacode()
+command -range=% Instacode :call Instacode(<line1>, <line2>)
 if !hasmapto("<Esc>:Instacode<CR>")
-	vnoremap <leader>ic <Esc>:Instacode<CR>
+	xnoremap <leader>ic :Instacode<CR>
 endif
 
 let &cpo = s:save_cpo