/************************************************************************************************
DATE : 2008-01-01
WRITER : ???
DEFINITION : CRD ?? JavaScript
*************************************************************************************************/
/**
 * ??? ???? ?? ?????? ??
 *
 */
function intComma(num){
 	var result ="";
 	for(var i=0; i<num.length; i++) {
  		var tmp = num.length-(i+1)
  		if(i%3==0 && i!=0) 
   			result = ',' + result;
  			result = num.charAt(tmp) + result;
 	}
 	return result;
}

/**
 * ??? ?? ?? ????? ??? ?? ???.
 *
 */
function makeArray(iSize)
{
  this.length = iSize;

  for (i = 1; i <= iSize; i++)
  {
    this[i] = 0;
  }
  return this;
}

function lastDay(sYM)
{
  
  daysArray = new makeArray(12);    // ??? ????.

  for (i=1; i<8; i++)
  {
    daysArray[i] = 30 + (i%2);
  }
  for (i=8; i<13; i++)
  {
    daysArray[i] = 31 - (i%2);
  }		
  var sYear = sYM.substring(0, 4) * 1;
  var sMonth	= sYM.substring(4, 6) * 1;
	
  if (((sYear % 4 == 0) && (sYear % 100 != 0)) || (sYear % 400 == 0))
  {
		daysArray[2] = 29;
  }
  else
  {
		daysArray[2] = 28;
  }
	
  return daysArray[sMonth].toString(); 
}