Espero que esto te ayude un poko...
salu2...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<script language="JavaScript">
function ventanaSecundaria (URL){
window.open("http://www.google.com.mx","ventana1","width=500, height=350, scrollbars=no, menubar=no, location=no, resizable=no")
}
</script>
</HEAD>
<BODY>
<form>
<a href="javascript
:ventanaSecundaria(this.form);"><i mg src="cualquierimagen.loquesea"></a>
</form>
</BODY>
</HTML>