Hide Overwrite existing files Option of Upload Document Page in SharePoint 2010

Requirement:
Uncheck and Hide Overwrite existing files Option in Upload Document Page of SharePoint 2010.

Solution:
If the "Overwrite existing files" option to be turned off for all uploads, You can Locate these lines and Change the Checked="true" to Checked="false" in Uploadex.aspx file as below:

1. <asp:CheckBox id="OverwriteSingle" Checked="true" Text=<%$Resources:wss,upload_document_Overwrite_file%>" runat="server" />
2. <asp:CheckBox id="OverwriteMultiple" Checked="true" Text=<%$Resources:wss,upload_document_Overwrite_version%>" runat="server" />

Alternatively, Lets set this option only for specific site. 

• Login to your SharePoint Web Front End Server, Navigate to: "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\template\layouts" folder
• Make a backup of "Uploadex.aspx" file and open it in Notepad.
• Search for text </asp:Content> from the top and Insert the below code in it.

• <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js" type="text/javascript"></script>
  <script type="text/javascript">
   $(document).ready( function () {
   if(location.href.indexOf('globalfunctions/credit/_layouts/Upload.aspx') >= 0) {
  
              $("input[id$='OverwriteSingle']").removeAttr('checked');
              $("input[id$='OverwriteSingle']").hide();
              $("label[for$='OverwriteSingle']").hide();
              $("a[id$='UploadMultipleLink']").hide();
  
        }
   });   
  </script>
  

• Save and close the uploadex.aspx file. Repeat these steps in all your web front end servers if you have more than one.

My requirement is to hide overwrite existing files and upload multiple files options for only a particular subsite, so I've wrapped the code inside "IF" condition. Here is the Result of hidden overwrite existing files option and multiple upload link in upload page: