<!--
function Jtrim(str)
{

        var i = 0;
        var len = str.length;
        if ( str == "" ) return( str );
        j = len -1;
        flagbegin = true;
        flagend = true;
        while (( flagbegin == true) && (i< len))
        {
           if ( str.charAt(i) == " " )
                {
                  i=i+1;
                  flagbegin=true;
                }
                else
                {
                        flagbegin=false;
                }
        }

        while  ((flagend== true) && (j>=0))
        {
            if (str.charAt(j)==" ")
                {
                        j=j-1;
                        flagend=true;
                }
                else
                {
                        flagend=false;
                }
        }

        if ( i > j ) return ("");

        trimstr = str.substring(i,j+1);
        return trimstr;
}


function isValidDate( year, month, day )
{
   year  = parseInt(year,10);
   month = parseInt(month,10);
   day   = parseInt(day,10);

   if (( month==4) || (month==6) || (month==9) || (month==11) )
   { if (( day < 1) || (day > 30) )
     { alert( "日期在1 - 30之间" );
       return (false);
     }
   }
   else
   { if ( month!=2 )
     { if ( (day < 1) || (day > 31 ))
       {  alert( "日期在1 - 31之间" );
          return (false);
       }
     }
     else
     { // month == 2
       if ( ( year % 100 ) != 0 && (year % 4 == 0) || ( year % 100 ) == 0 && ( year % 400) == 0 )
       { if ( day > 29 )
         {  alert( "日期在1 - 29之间" );
            return (false);
         }
       }
       else
       { if ( day > 28 )
         { alert( "日期在1 - 28之间" );
           return (false);
         }
       }
     }
   }
 return (true);
}

function DateCompare(YearFrom, MonthFrom, YearTo, MonthTo)
{  YearFrom  = parseInt(YearFrom,10);
   MonthFrom = parseInt(MonthFrom,10);
   YearTo    = parseInt(YearTo,10);
   MonthTo   = parseInt(MonthTo,10);

   if (YearFrom > YearTo)
     { return false;}
   else
   {  if (YearFrom == YearTo)
      {  if (MonthFrom > MonthTo)
            return false;
      }
   }
   return true;
}


//-->