Adsense Link unit in your Blog Header

To put an Adsense Link Unit Ad. in the header..........

Log in to your Dashboard. Click on your 'Layout' link under your blog name. This takes you to Page Elements under the Template tab. Click on Edit Html. Scroll down in Edit Template field till you come to :

<div id='header-wrapper'>
<b:section class='header' id='header' maxwidgets='2' preferred='yes' showaddelement='yes'>

Change the second line to be the same as the second and third lines above.
Save Template.
Go to Page Elements subtab.
Now you will see in the Header Section an 'Add Page Element' link.
Click on the link and in the popup window choose Html/Javascript.
Paste your Adsense 728 by 15 Ad. Javascript code in Content field.
Save. The Ad. unit is placed above the Title unit.
Click and drag this to below the Title unit.
Save.
View blog.

Source : http://www.blogdoctor.me/2006/10/how-to-put-adsense-link-unit-in-your.html