<input type="text" autocomplete="on" name="demoAutoComplete" list="autoNames" />
<datalist id="autoNames">
<option value="509">T5</option>
<option value="709V">V7</option>
<option value="709X">X7</option>
</datalist>
原文：http://www.cnblogs.com/qfkobe24/p/4529624.html