Never have your javascript die from forgetting to take out console.log statements again!

mock_console.js

// If console is not defined (ie the browser isn't 
// using developer extensions), this will keep console
// statements accidentally left in the code from
// causing errors for the end user.
//
if(console == null) {
  var console = {
    log: function() {
      // do nothing
    }
  };
}