Adding Alt Tags
Sample ( move mouse on the text and click)

Come and click me

<a target="_top" href="http://your url" title="your description">your link text here</a>


You can add alt tags to your images also
<a target="_top" href="http://your url"><img alt="your description" src="http://www.image.gif" border="0">

Sample
-You need to change the target as you like it, URL ,your description and your link text .

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Marquee

<MARQUEE direction=up onmouseout=this.start() onmouseover=this.stop() scrollAmount=5 scrollDelay=3 width="446"> <a href="http://www.your URL/" target="_top">Your Text</a> <a href="http://www.your URL/"target="_top">What u want to say</a></marquee>
Sample  for left text Marquee 

  Syiekatsuya Homepage My Weblog.
　

<MARQUEE direction=left onmouseout=this.start() onmouseover=this.stop() scrollAmount=3 scrollDelay=60 width="443"> <a href="http://www.URL/" target="_top"><img src="http://img.URL.gif" border="0"></a> <a href="http://www.URL/" target="_top"><img src="http://img.URL.gif" border="0" alt="Welcome text..."></a> </marquee>
Sample  for image Marquee up