Javascript เปิดกับ IE ได้ แต่เปิดกับ Firefox ไม่ขึ้นครับ ช่วยที

<SCRIPT type="text/javascript" language="JavaScript>
<!-- Begin
var now = new Date();
var month_array = new Array("มกราคม","กุมภาพันธ์","มีนาคม","เมษายน","พฤษภาคม","มิถุนายน","กรกฎาคม","สิงหาคม","กันยายน","ตุลาคม","พฤศจิกายน","ธันวาคม");
document.write("<form name=date_list><table  bgcolor=#C8C8FF><tr style='font-family:MS Sans Serif;font-size:8pt;'><td style='font-family:MS Sans Serif;font-size:8pt;'>");
document.write("<select name=month onchange=change_month(this.options.selectedIndex)>");
for(i=0;i<month_array.length;i++)
{
 if (now.getMonth() != i)
 {document.write ("<option value="+i+">"+month_array[i]);}
 else
 {document.write ("<option value="+i+" selected>"+month_array[i]);}

}
document.write("</select>");
document.write("</td><td>");
document.write ("<select name=year onchange=change_year(this.options[this.options.selectedIndex])>");
for(i=1950;i<3000;i++)
{
 if (now.getYear() != i)
 {document.write("<option value="+i+">"+i);}
 else
 {document.write("<option value="+i+" selected>"+i);}
}
document.write("</select></td></tr><tr style='font-family:MS Sans Serif;font-size:8pt;'><td colspan=2><center>");

document.write("<table bgcolor=white border=0 cellspacing = 0 cellpading = 0 width=100%><tr style='font-family:MS Sans Serif;font-size:8pt;' bgcolor=#006699 align=center>");
document.write("<td><font  color=yellow>M</font></td><td><font  color=pink>T</td><td><font color=#00ff66>W</td><td><font color=orange>Th</td><td><font color=#CCF2FF>F</td><td ><font color=violet>S</td><td ><font color=red>S</td>");
document.write("</tr><tr style='font-family:MS Sans Serif;font-size:8pt;'>");
for(j=0;j<6;j++)
{
 for(i=0;i<7;i++)
 {
   document.write("<td  style='font-family:MS Sans Serif;font-size:8pt;' align=center id=d"+i+"r"+j+"></td>")
 }
 document.write("</tr>");
}

document.write("</table>");

document.write("</center></from></td></tr></table>");

var show_date = new Date();

function set_cal(show_date)
{
begin_day = new Date (show_date.getYear(),show_date.getMonth(),1);
begin_day_date = begin_day.getDay();
end_day = new Date (show_date.getYear(),show_date.getMonth()+1,1);
count_day = (end_day - begin_day)/1000/60/60/24;
input_table(begin_day_date,count_day);
}
set_cal(show_date);

function input_table(begin,count)
{
init();
j=0;
if (begin!=0){i=begin-1;}else{i=6}
for (c=1;c<count+1;c++)
{
 colum_name = eval("d"+i+"r"+j);
 if ((now.getDate() == c)&&(show_date.getMonth() == now.getMonth())&&(show_date.getYear() == now.getYear())) {colum_name.style.backgroundColor = "#ff3399";colum_name.style.color = "white";};
 colum_name.innerText =  c;
 i++;
 if (i==7){i=0;j++;}
}
}

function init()
{
for(j=0;j<6;j++)
{
 for(i=0;i<7;i++)
 {
 colum_name = eval("d"+i+"r"+j);
 colum_name.innerText =  "-";
 colum_name.style.backgroundColor ="";
 colum_name.style.color ="";
 }
}
}

function change_month(sel_month)
{
show_date = new Date(show_date.getYear(),sel_month,1);
set_cal(show_date);
}

function change_year(sel_year)
{
sel_year = sel_year.value;
show_date = new Date(sel_year,show_date.getMonth(),1);
set_cal(show_date);
}
//  End -->
                </SCRIPT>