To specify the location of a new window (p. 257)
onClick="MM_openBrWindow('./test.html','','width=200,height=200,top=400 left=600,3')"
To write a cookie (p. 273-74)
<input name="thankyou" type="button" id="thankyou" value="Thank You">
and
onClick="writeCookie('pagecolor',document.forms[0].colormenu.value,'1');"
To read a cookie (p. 290)
<script language="JavaScript"> document.bgColor = readCookie('pagecolor'); </script>