If I select status as R then in the list box Names I have to move bbb under optgroup No Values and disable it.
<HTML><BODY bgColor=#cfe8f5 leftMargin=0 topMargin=0>
<FORM name=search action=/search.php method=get><INPUT
type=hidden value=0 name=st_index>
<DIV style="WIDTH: 980px; TOP: 20px" align=center>
</DIV>
<DIV style="WIDTH: 980px; TOP: 20px" align=center>
<TABLE cellSpacing=8 cellPadding=0 border=0>
<TBODY>
<TR>
<TD align=left><LABEL><FONT face=Arial color=#006699>Status </FONT></LABEL></TD>
<TD align=left><LABEL><FONT face=Arial color=#006699>: </FONT></LABEL></TD>
<TD align=left>
<!-- set the value of status to that of submitted by the user -->
<SELECT
name=status>
<OPTION value=-- selected>--
<OPTION
value=R>R
<OPTION value=C>C
<OPTION value=S>S
<OPTION
value=Q>Q</OPTION>
</SELECT>
</TD>
</TR>
<TR>
<TD align=left><LABEL><FONT face=Arial color=#006699>Name </FONT></LABEL></TD>
<TD align=left><LABEL><FONT face=Arial color=#006699>: </FONT></LABEL></TD>
<TD align=left>
<SELECT
onchange="if(this.options[this.selectedIndex].state=='disabled') this.selectedIndex=0"
name=names>
<OPTION value=-- selected>--
<OPTION value=aaa>aaa</OPTION>
<OPTION
value=bbb>bbb</OPTION>
<OPTGROUP
label="No Values">
<OPTION value=ccc>ccc</OPTION>
<OPTION
value=ddd>ddd</OPTION>
</OPTGROUP>
</SELECT>
</TD>
</TR>
<TR>
<TD></TD>
<TD align=right>
<INPUT type=submit value="View" name=submit>
</TD>
<TD align=left>
<INPUT type=reset value=Reset>
</TD>
</TR>
</TBODY>
</TABLE>
<HR>
</FORM></BODY></HTML>
