Hide Save button on Multipage Survey Page

To hide save button on mutipage survey following javascript can be used. Insert following javascript block within PlaceHolderMain after <asp:Content ContentPlaceHolderId="PlaceHolderMain" runat="server"> line of NewForm.aspx & EditForm.aspx page of the Survey

<script type="text/javascript" >

_spBodyOnLoadFunctionNames.push('hideSave');

function hideSave()

{

var tags=document.getElementsByTagName('input');

alert(tags.length);

for(var i=1; i<tags.length; i++)

{

if(tags[i].value=='Save')

{

tags[i].style.visibility='hidden';

}

}

}

</script>

Show PDF icon in SharePoint Library view

To show the PDF icon (or any other icon) in SharePoint Document Library view do following:
1. Find 16x16 icon file, say pdficon.gif and upload it under \12\TEMPLATE\IMAGES folder
2. Then open \12\TEMPLATE\XML\DOCICON.XML and in the "By Extension" section add the following configuration line:
< key="pdf" value="pdficon.gif">

Restart IIS and now PDF icon should appear against PDF files in any document Library.

Do the same for other file types also.