Converting the complex dropdown to a simple dropdown using SPServices

Introduction

The SPComplexToSimpleDropdown function lets you convert a "complex" dropdown rendered by SharePoint in a form to a "simple" dropdown. It can work in conjunction with SPCascadeDropdowns; call SPComplexToSimpleDropdown. SharePoint Lookup Column renders dropdowns differently in Internet Explorer depending on whether they have fewer than 20 options or 20+ options.

Object 

<script language="javascript" src="/_layouts/Server/NewScript/jquery.min.js"type="text/javascript"></script>

<script language="javascript" src="/_layouts/Server/NewScript/jquery.SPServices-0.7.1a.min.js" type="text/javascript"></script>

<script language="javascript" type="text/javascript">

$(document).ready(function (){

  $().SPServices.SPComplexToSimpleDropdown({

            columnName: "City"

        });

    });</script>

The complex dropdown (as shown in the image above) is converted to a simple dropdown

Summary

In this Article We achieve if the parent list has more than 20 entries. SharePoint 2010 changes from a dropdown to an ajaxy-style 'type ahead'-field.Using SPServices SPComplexToSimpleDropdown We convert into simple dropdown.