sharepoint 2010 cascadingdropdown jquery

Download JS and Script at Here
Create custom list with name is Region (Title=>Default)

Create custom list States (Title=> Default, Region => lookup to Regions list)

Create custom list CascadeDemo (Title=> Default, Region => lookup to Regions list, State => lookup to States list)

Note: Should not change internal name of field Region and State (!Important)

Go to list CascadeDemo => list setting >> Advanced Setting >> at Launch forms in a dialog and choose No

Upload 2 jquery libraries to Shared Documents (you can download at here)

At forn NewForm.aspx of CascadeDemo add content editor webpart then click Edit HTML Source follow the image

Input the code like this

<script language="javascript" type="text/javascript" src="/Shared%20Documents/jquery-1.8.2.min.js"></script>

<script language="javascript" type="text/javascript" src="/Shared%20Documents/jquery.SPServices-0.7.2.min.js"></script>

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

$(document).ready(function() {

            // Set up the cascade from Region to State

            $().SPServices.SPCascadeDropdowns({

                        listName: "CascadeDemo",

                        relationshipList: "States",

                        relationshipListParentColumn: "Region",

                        relationshipListChildColumn: "Title",

                        relationshipListSortColumn: "Title",

                        parentColumn: "Region",

                        childColumn: "State"

            });

});

</script>

The result as

And

Finish