JqueryAutocomplete

<apex:page controller="MyJSController">

  <link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
  <script src="http://code.jquery.com/jquery-1.9.1.js"></script>
  <script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
  
  
 <script type="text/javascript">
 
  $(function() {
       
        Visualforce.remoting.Manager.invokeAction(
            '{!$RemoteAction.MyJSController.getAccount}',
            function(result, event){
                if (event.status) {
                
                 var availableTags = [];
                  availableTags=result;
                  
                 // alert('availableTags'+availableTags);
                       
                $( "#tags" ).autocomplete({
                  source: availableTags
                });
                   
                } else if (event.type === 'exception') {
                    
                } else {
                   
                }
            }, 
            {escape: true}
        );
   }); 
    
    </script>



 
<div class="ui-widget">
  <label for="tags">Tags: </label>
  <input id="tags" />
</div>
 

</apex:page>

MyJSController

global with sharing class MyJSController {
    public String accountName { get; set; }
    public static Account account { get; set; }
    public MyJSController() { } // empty constructor 
    
    
    @RemoteAction
    global static List<String> getAccount() {
    
    List<String> accname=new List<String>();
    
       List<Account> lstaccount = [SELECT id, name, phone, type, numberofemployees FROM 
                   Account];
        for( Account acc:lstaccount){
            accname.add(acc.name);
        }           
                   
        return accname;
    }
}