[問題] javascript

[ntouckcm (知足常樂)]

<SCRIPT LANGUAGE="JavaScript">
function Calendar(Month,Year)
{
     document.write("<FORM NAME='Cal'><TABLE BGCOLOR='lightskyblue'><TR><TD
ALIGN=LEFT>");
     document.write("<FONT COLOR='#0000BB' FACE='Arial'
SIZE=+1>",names[Month]," ",Year,"</FONT></TD><TD WIDTH=50% ALIGN=RIGHT>");
     document.write("</TD></TR><TR><TD ALIGN=CENTER COLSPAN=2>");

     firstDay = new Date(Year,Month,1);
     startDay = firstDay.getDay();

     if (((Year % 4 == 0) && (Year % 100 != 0)) || (Year % 400 == 0))
          days[1] = 29;
     else
          days[1] = 28;

     document.write("<TABLE CALLSPACING=0 CELLPADDING=0 BORDER=1
BORDERCOLORDARK='#FFFFFF' BORDERCOLORLIGHT='#C0C0C0'><TR>");

     for (i=0; i<7; i++)
     {
          document.write("<TD WIDTH=50 ALIGN=CENTER VALIGN=MIDDLE><FONT
SIZE=-1 COLOR='#000000' FACE='ARIAL'><B>",dow[i],"</B></FONT></TD>");
     }

     document.write("</TR><TR ALIGN=CENTER VALIGN=MIDDLE>");

     var column = 0;
     var lastMonth = Month - 1;
     if (lastMonth == -1)
          lastMonth = 11;
     for (i=0; i<startDay; i++)
     {
          document.write("<TD WIDTH=50 HEIGHT=30><FONT SIZE=-1
COLOR='#808080' FACE='ARIAL'>",days[lastMonth]-startDay+i+1,"</FONT></TD>");
          column++;
     }

    for (i=1; i<=days[Month]; i++)
     {

          if ((i == thisDay)  && (Month == thisMonth) && (Year == thisYear))
   //當天，特別註明
               document.write("<TD WIDTH=50 HEIGHT=30 BGCOLOR='#FFFFFF'
BORDERCOLORDARK='#000000' BORDERCOLORLIGHT='#C0C0C0'><FONT SIZE=-1
COLOR='#FF0000' FACE='ARIAL'>",i,"</FONT></TD>");
           else
               document.write("<TD WIDTH=50 HEIGHT=30><FONT SIZE=-1
COLOR='#0000BB' FACE='ARIAL'>",i,"</FONT></TD>");
          column++;
          if (column == 7)
          {
               document.write("</TR><TR ALIGN=CENTER VALIGN=MIDDLE>");
               column = 0;
          }

     }
     document.write("</TR></TABLE>");
     document.write("</FORM></TD></TR></TABLE>");
}
function Skip(Direction) {
    if (Direction == '+') {
    if (month == 11) {
    Selected_Month = 0;
    Selected_Year=year+1;
    }
    else {
    Selected_Month=month+1;
      Selected_Year=year;    }
   }
  else {
    if (month == 0) {
    Selected_Month = 11;
    Selected_Year=year-1;
  }
  else {
      Selected_Month=month-1;
      Selected_Year=year;
  }
}
 Calendar(Selected_Month,Selected_Year);
}

function array(m0, m1, m2, m3, m4, m5, m6, m7, m8, m9, m10, m11)
{
     this[0] = m0; this[1] = m1; this[2]  = m2;  this[3]  = m3;
     this[4] = m4; this[5] = m5; this[6]  = m6;  this[7]  = m7;
     this[8] = m8; this[9] = m9; this[10] = m10; this[11] = m11;
}
</SCRIPT>
<P>
<CENTER>
<SCRIPT LANGUAGE="JavaScript">
var Selected_Month;
var Selected_Year;
var today = new Date();
var year  = today.getYear();
var month = today.getMonth();
var names = new
array("January","February","March","April","May","June","July","August","September","October","November","December");
var days  = new array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
var dow   = new
array("Sun","Mon","Tue","Wed","Thu","Fri","Sat","","","","","");
var today     = new Date();
var thisDay   = today.getDate();
var thisMonth = today.getMonth();
var thisYear  = today.getYear() ;
document.write("<input type='button' value='上個月' onClick=\"Skip('-')\">");
document.write("<input type='button' value='下個月' onClick=\"Skip('+')\">");
Calendar(month,year);
</SCRIPT>
按上個月和下個月可以跑，但是跑出來怪怪的，高手們是否可以幫我看看哪裡錯了呢?
我找了半天 找不出來，謝謝!

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