On web forms the browser stores previously typed in data and if you start typing in the same data a dropdown list appears below with these options. Sometimes this can be annoying and gets in the way when you use the form regularly with unique data each time. To turn this function off on selected form elements use the following code:

<input type="text" value="test text" autocomplete="off" />

Use the attribute in the input element autocomplete with the value off to stop the drop down list appearing.