jquery autocomplete在chrome（劫持？）vs firefox中输入密钥

Got a situation here, I am using jquery autocomplete on a textbox. I am also listening to the keypress event on the textbox... so that when I type in the textbox, autocomplete shows up with suggested text, if I do not select the suggested text and press enter, it should submit the form, if I select a suggested text and hit enter, it selects the suggested value and closes the autocomplete box, if I hit enter again, it will submit the form.Got a situation here, I am using jquery autocom