<iframe src="http://www.xxx.xx/files/"+"<%$ QueryString:name%>" height="800" width="800" name="pdf">Text</iframe>
<% if (Request.QueryString["name"] != null) { %> <iframe src='default23.aspx?name=<%=Request.QueryString["name"].ToString()%>' width ="400" height ="400"></iframe> <% }%>
try this... name=".pdf"
<%=Request["name"] %>
var
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