I can't figure out what's wrong

I'm getting this message in error console:

Error: uncaught exception: [Exception... "Cannot modify properties开发者_运维技巧 of a WrappedNative"  
nsresult: "0x80570034 (NS_ERROR_XPC_CANT_MODIFY_PROP_ON_WN)"  location: "JS frame :: 
chrome://global/content/bindings/autocomplete.xml :: onxblpopuphiding :: line 834"  data: no]

I checked everything I've possibly can, but I don't see what's wrong! I tried clearing cache, 3 times. I tested on a second computer, and it still doesn't work. Edit: It shows the data for one second or so and then disappears.

The values were disappearing because the submit button is posting the form and therefore refreshing the page. Simply change:

<input type='submit' value='Submit' onclick='process()'>

to:

<input type='button' value='Submit' onclick='process()'>

... and the data will not disappear when you click the button.

An <input type="button"> defines a clickable button, that does not automatically submit the form when clicked. In fact this button type is often used to call a JavaScript function through the onClick event, as you were doing in your web page.

As for the uncaught exception, this is probably related to a browser plugin, as Sarfraz Ahmed suggested.

I saw your page, and for me it did not generate the error you have shown. This must be the firefox addon related error. As you can see from the path too:

chrome://global/content/bindings/autocomplete.xml

There must be something else going on with it i suspect.