target browser check warning

[phototaker]

hello, my question has to do with warning about show-hide layers I did to create disjonted rolloverin dreamweaver and I was wondering if I can make these actions show up in all later version browsers? Here is the warning-The Object tag is not supported.
Netscape Navigator 4.0-----
line 49 <object classid=&quot;clsid27CDB6E-AE6D-11cf-96B8-444553540000&quot; codebase=&quot;

http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0&quot;

width=&quot;50&quot; height=&quot;50&quot; onMouseOver=&quot;MM_showHideLayers('Lindsey','','show')&quot; onMouseOut=&quot;MM_showHideLayers('Lindsey','','hide')&quot;>
also lines 55, 61, 67, 73, 79, 93.

web page address is

http://richard.rownak.net/page2.html