calendar script help

[BEFOR]

This works, but how can you get the below to direct to a different page based on month select?

This will not work as a .htm only as php, how can I change this?

<?php
//Render the $Month and $Year values current if not available.
if((!$Month) && (!$Year)) {
$Month = date("m");
$Year = date("Y");
}
// Calculate the Month being viewed.
$Timestamp = mktime (0,0,0, $Month, 1, $Year);
$MonthName = date("F", $Timestamp);
// Create a table that presents the right month.
print ("<TABLE BORDER=0 CELLPADDING=4 CELLSPACING=0 ALIGN=CENTER>");
print ("<TR BGCOLOR=#BBBBFF><TD COLSPAN=9 ALIGN=CENTER><FONT COLOR=#FFFFFF><B>
$MonthName $Year</B></FONT></TD></TR>");
print ("<TR BGCOLOR=#BBBBFF>
<TD ALIGN=CENTER WIDTH=25><B>
<FONT COLOR=#FFFFFF>Sun</FONT></B></TD>
<TD ALIGN=CENTER WIDTH=25><B>
<FONT COLOR=#FFFFFF>Mon</FONT></B></TD>
<TD ALIGN=CENTER WIDTH=25><B>
<FONT COLOR=#FFFFFF>Tue</FONT></B></TD>
<TD ALIGN=CENTER WIDTH=25><B>
<FONT COLOR=#FFFFFF>Wed</FONT></B></TD>
<TD ALIGN=CENTER WIDTH=25><B>
<FONT COLOR=#FFFFFF>Thur</FONT></B></TD>
<TD ALIGN=CENTER WIDTH=25><B>
<FONT COLOR=#FFFFFF>Fri</FONT></B></TD>
<TD ALIGN=CENTER WIDTH=25><B>
<FONT COLOR=#FFFFFF>Sat</FONT></B></TD>
</TR>\n");

$MonthBegin = date("w", $Timestamp);
if ($MonthBegin == 0){
     $MonthBegin=7;
}

$EndDay= date("d", mktime(0,0,0, $Month+1, 0, $Year));
$BeginDate = -$MonthBegin;
for ($k = 1; $k<=6; $k++) {//Print 6 total rows.
print("<TR BGCOLOR=#FFFFFF>");
for ( $i=1; $i<=7; $i++){//With 7 cols
	$BeginDate++;
         if $BeginDate++;
          if(($BeginDate <=0)||
            ($BeginDate > $EndDay)){
             print ("<TD BGCOLOR=#99FF99>
              &nbsp </TD>");   

       }elseif(($BeginDate >=1) &&
        ($BeginDate <=$EndDay)) {
            print ("<TD ALIGN=CENTER>
           $BeginDate </TD>");
	}
     }
      print("</TR>\n");
}
print ("</TABLE>\n");
//Create the form.

print ("<FORM ACTION=\"index.htm\"
METHOD=GET>\n");
print("Choose a month:\n");

print("<SELECT NAME=Month>
<OPTION VALUE=1> January</OPTION>\n
<OPTION VALUE=2> February</OPTION>\n
<OPTION VALUE=3> March</OPTION>\n
<OPTION VALUE=4> April</OPTION>\n
<OPTION VALUE=5> May</OPTION>\n
<OPTION VALUE=6> June</OPTION>\n
<OPTION VALUE=7> July</OPTION>\n
<OPTION VALUE=8> August</OPTION>\n   

<OPTION VALUE=9> September</OPTION>\n
<OPTION VALUE=10> October</OPTION>\n
<OPTION VALUE=11> November</OPTION>\n
<OPTION VALUE=12> December</OPTION>\n
</SELECT>\n");

print("<SELECT NAME=Year>
<OPTION VALUE=2004>2004</OPTION>\n
<OPTION VALUE=2005>2005</OPTION>\n
<OPTION VALUE=2006>2006</OPTION>\n
<OPTION VALUE=2007>2007</OPTION>\n
<OPTION VALUE=2008>2008</OPTION>\n
<OPTION VALUE=2009>2009</OPTION>\n
<OPTION VALUE=2010>2010</OPTION>\n
</SELECT>\n");

print ("<INPUT TYPE=SUBMIT NAME=SUBMIT
VALUE=\"GO\">\n");
print ("</FORM>\n");
?>