js implements form automatic completion function_javascript skills

Recently, I was working on an employee registration page. One of the items is to register a company. However, if the company has already been registered, the company name is required to be written exactly the same, without any difference in case, etc., so I plan to use Javascript to write a simulated auto-complete function and style. It is modeled after IE7, but there are still many shortcomings. I hope everyone will support it.

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>www.jb51.net Script House Autocomplete Function</title> <style type="text/css"> <!-- .select{background-color:highlight;color:#FFF}.unselect{background-color:#FFF;color:#000} --> </style> <form method="post" action=""> <p><label for="test">Test:</label><input type="text" name="test" id="test"></p> </form>
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