<input type="submit" value="btn1" onclick="setImage('image', 'img1.gif')">
<input type="submit" value="btn2" onclick="setImage('image', 'img2.gif')">
<img name="image" border=0 src="img1.gif">
<input type="submit" value="btn2" onclick="setImage('image', 'img2.gif')">
<img name="image" border=0 src="img1.gif">
<HEAD>
<META NAME="GENERATOR" Content="SAPIEN Technologies PrimalSCRIPT(TM)">
<TITLE>Document Title</TITLE>
<script language="javascript">
function alertimage(i)
{
document.all.img1.src= "images/"+i+".gif";
}
</script>
</HEAD>
<BODY>
<form name=form1>
<table>
<tr>
<td width="243" height="300" align="center"><img id='img1' src="images/bg1.gif" width="220" height="164" border="1"></td>
</tr>
</table>
<input type=button name=but1 onclick=alertimage("bg1")>
<input type=button name=but2 onclick=alertimage("bg2")>
</form>
</BODY>
</HTML>
<head></head>
<script language=vbscript>
sub setImg(a)
image.src=a
end sub
</script>
<body>
<input type="button" value="btn1" onclick="setImg('img1.gif')">
<input type="button" value="btn2" onclick="setImg('img2.gif')">
<img name="image" border=0>