//¹øÈ£¸¸ µé¾î¿À´ÂÁö üũÇÏ´Â ÇÔ¼ö
    function check_number(num_data)
    {
		error = false;
		check_data = num_data.value;

		for (i=0; i<check_data.length; i++)
		{
			if ((check_data.charAt(i) < "0") || (check_data.charAt(i) > "9"))
			{
				error = true;
				break;
			}
		}
	
		return error;
    }

    //¾ËÆĺª¸¸ µé¾î¿À´ÂÁö üũÇÏ´Â ÇÔ¼ö
    function check_alphabet(data)
    {
		error = false;
		check_data = data.value.toLowerCase();

		for (i=0; i<check_data.length; i++)
		{
			if ((check_data.charAt(i) < "a") || (check_data.charAt(i) > "z"))
			{
				error = true;
				break;
			}
		}
	
		return error;
    }    

    //¿µ¹®ÀÚ¿Í ¼ýÀÚ,ÇÏÀÌÇÂ(-)¸¸ µé¾î¿À´ÂÁö üũÇÏ´Â ÇÔ¼ö
    function check_alphanum(data)
    {
		error = false;
		check_data = data.value.toLowerCase();

		for (i=0; i<check_data.length; i++)
		{		  
			if (!(((check_data.charAt(i) >= "a") && (check_data.charAt(i) <= "z")) || ((check_data.charAt(i) >= "0") && (check_data.charAt(i) <= "9")) || check_data.charAt(i) == "-"))
			{			  
				error = true;
				break;
			}
		}
	
		return error;
    }    

    //µé¾î¿Â°ªÀÌ °ø¹é°ú NullÀÏ°æ¿ì¸¦ üũÇÏ´Â ÇÔ¼ö
    function remove_blank(field_data)
    {
        org_data = field_data.value;
        res_data = "";
        error = false;

        for (i=0; org_data.length > i; i++)
        {
          temp_ch = org_data.charAt(i);

          if (temp_ch != " ")
          {
            res_data = org_data.substring(i, org_data.length);
            break;
          }
        }

        for (i=res_data.length-1; 0 <= i; i--)
        {
          temp_ch = res_data.charAt(i);

          if (temp_ch != " ")
          {
            res_data = res_data.substring(0, i+1);
            break;
          }
        }

        if (res_data.length == 0)
        {
            field_data.value = "";
            error = true;
        }
        
        return error;
    }
    
    //¹ÙÀÌÆ® Å©±â °Ë»çÇÏ´Â ÇÔ¼ö
    function cal_byte( aquery, limit_length )
	{
		var tmpStr;
		var temp = 0;
		var onechar;
		var tcount;
		tcount = 0;
		error = false;

		tmpStr = new String( aquery.value );
		temp = tmpStr.length;

		for ( k = 0 ; k < temp ; k++ )
		{
			onechar = tmpStr.charAt( k );

			if ( escape( onechar ).length > 4 )
				tcount += 2;
			else if ( onechar != '\r' )
				tcount++;
		}

		if( tcount > limit_length )
			error = true;
		else
			error = false;
			
		return error;
	}
	
	//À¯È¿ÇÑ ³¯Â¥ÀÎÁö¸¦ °Ë»çÇÏ´Â ÇÔ¼ö
	function DayCheck( obj )
	{
		error = true;
		current = false;

		if( obj.length != 8 )
			return error;
		
		var year = obj.substring( 0, 4 );
		var month = obj.substring( 4, 6 );
		var day = obj.substring( 6, 8 );
		var	sum = 0;
		var i;
		
		if( day == "00" )
			return error;
		
		if( month.substring( 0, 1 ) == "0" )
			month = month.substring( 1, 2 );
		
		if( day.substring( 0, 1 ) == "0" )
			day = day.substring( 1, 2 );
		
		if( month > 12)
			return error;
		
		if( month == "1" || month == "3" || month == "5"|| month == "7" || month == "8" || month == "10" || month == "12" )
		{
			if(parseInt( day ) > 31)
				return error;
		}
		else if(month == "2")
		{
			if( parseInt( year ) % 4 == 0 && parseInt( year ) % 100 != 0 || parseInt( year ) % 400 == 0 )
			{
				if( parseInt( day ) > 29 )
					return error;
			}
			else if( parseInt( day ) > 28 )
				return error;
		}
		else if( parseInt( day ) > 30 )
			return error;

		return current;
	}
	
	//½Ã°£ üũÇÏ´Â ÇÔ¼ö(24½Ã ÇüÅÂ)
	function TimeCheck( obj )
	{
		error = true;
		current = false;
		
		if ( obj.length != 4 )
			return error;
			
		var hour = obj.substring( 0, 2 );
		var minute = obj.substring( 2, 4 );
		
		if( hour.substring( 0, 1 ) == "0" )
			hour = hour.substring( 1, 2 );
		
		if( minute.substring( 0, 1 ) == "0" )
			minute = minute.substring( 1, 2 );
		
		if ( hour > 23 )
			return error;
		else if ( minute > 59 )
			return error;
		else
			return current;
	}
	
	//¼ýÀÚ¸¦ Äĸ¶ ºÙ¿©¼­ ¸®ÅÏÇØÁØ´Ù.
    function price_comma( inja )
    {
        var returnStr = "";

        if ( inja.value == "" )
            return returnStr;

        var price = inja.value;

        var i;
        var length;

        var comma = price.indexOf( ".", 0 );

        if ( comma != -1 )
            length = price.substring( 0, comma ).length;
        else
            length = price.length;

        if ( length == 0 )
            return returnStr;

        for( i = 0 ; i < length ; i++ )
        {
            if ( ( i != length - 1 ) && ( ( length - i ) % 3 == 0 ) )
            {
                returnStr += price.charAt( i - 1 );
                returnStr += ",";
            }
            else
            {
                returnStr += price.charAt( i - 1 );
            }
        }

        returnStr += price.charAt( i - 1 );

        if ( comma != -1 )
            returnStr = returnStr + price.substring( comma, price.length );

        if ( returnStr.substring( 0, 1 ) == "," )
            returnStr = returnStr.substring( 1, returnStr.length );

        return returnStr;
    }
    
	//ÄÞ¸¶¸¦ ¾ø¾Ö´Â ÇÔ¼ö
	function rem_comma( inja )
	{
		result_sub_price = "";

		if ( inja.value == "" )
			return result_sub_price;

		sub_price = inja.value;

		for( i = 0 ; i < sub_price.length ; i++ )
		{
			if ( sub_price.charAt( i ) != "," )
				result_sub_price = result_sub_price + sub_price.charAt( i );
		}

		return result_sub_price;
	}
	
	//www(WWW)Á¦°ÅÇÏ´Â ÇÔ¼ö
	function remove_www( form_field )
	{

		if ( !remove_blank( form_field ) )
		{
  		res_data = form_field.value.toLowerCase();
			if ( ( res_data.substring( 0, 3 ) == "www" ) || ( res_data.substring( 0, 3 ) == "WWW" ) )
				res_data = res_data.substring( 4, res_data.length )
		}
		form_field.value = res_data;
	}
	
  function domain_chk( form_field )
  {
    form_field.value=form_field.value.replace(/[^0-9a-z-.]/gi,''); //¼ýÀÚ, ¿µ´ë¼Ò¹®ÀÚ, ÇÏÀÌÇÂ(-), Á¡(.) ¸¸ »©°í ¸ðµÎ Á¦°Å
    remove_www(form_field); //´ë¹®ÀÚ->¼Ò¹®ÀÚ·Î ¹Ù²Ù°í, www Á¦°Å
  }