title: Use URLbar to change textbox value? (JavaScript maybe?)
body: <p>Is there any way I can use the URLbar to change the value (the text) of a textbox?</p>
  
  <p>I can type "javascript:alert(document.lastModified)" into the URLbar, and it runs just fine--how can I run some javascript that says "Change X textbox's value to = Y"?</p>