The ContentType property specifies the HTTP content type for the response. If no ContentType is specifed, the default is text/HTML.
Response.ContentType [= ContentType ]
The following example sets the content type to Channel Definition Format(CDF).
<% Response.ContentType = "application/x-cdf" %>
The following examples set the ContentType property to other common values.
<% Response.ContentType = "text/HTML" %>
<% Response.ContentType = "image/GIF" %>
<% Response.ContentType = "image/JPEG" %>