Script for popping up a GMail compose window with info about the current page in it.

gistfile1.js

url='https://mail.google.com/mail?view=cm&tf=0&to=&su=';
if("" != document.getSelection()) {
  url += encodeURIComponent('[TUMBI]: ' + document.getSelection()) + "&body=" + encodeURIComponent(document.URL);
}
window.open(url, 'gmailForm', 'scrollbars=yes,width=680,height=510,top=175,left=75,status=no,resizable=yes');

void(0);