For one thing you have a syntax error:
Code:
<a href="#" onMouseover="modifyimage(dynloadarea', 0)">image 1 (onmouseover)</a><br>
should be:
Code:
<a href="#" onMouseover="modifyimage('dynloadarea', 0)">image 1 (onmouseover)</a><br>
Also, you would be better off changing this:
Code:
<a href="#" onClick="return modifyimage('dynloadarea2', 2)">image 3 (onclick)</a><p>
to this:
Code:
<a href="#" onClick="return modifyimage('dynloadarea', 2)">image 3 (onclick)</a><p>
If you do all that, you don't need to close them as one will replace the other.
I don't see any attempt to use thumbnails on your page but, just substituting an image tag of the thumbnail for the text will work:
Code:
<a href="#" onClick="return modifyimage('dynloadarea', 2)"><img src="somethumb.jpg"></a><p>
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