SharePoint 2010 + webpart page with quick launch

thanks to author @ http://pscave.blogspot.com/2010/10/show-quick-launch-on-sharepoint-2010.html

the steps are

Delete the following from your webpart page

1.

         < asp:Content ContentPlaceHolderId="PlaceHolderNavSpacer" runat="server"></asp:Content>

2.

< asp:Content ContentPlaceHolderId="PlaceHolderLeftNavBar" runat="server"></asp:Content>

3.

< style type="text/css">
body #s4-leftpanel {
display:none;
}
.s4-ca {
margin-left:0px;
}
</style>