// 전역 변수
var errmsg = "";
var errfld;

// 필드 검사
function check_field(fld, msg) 
{
    if ((fld.value = trim(fld.value)) == "") 			   
        error_field(fld, msg);
    else
        clear_field(fld);
    return;
}

// 필드 오류 표시
function error_field(fld, msg) 
{
    if (msg != "")
        errmsg += msg + "\n";
    if (!errfld) errfld = fld;
    fld.style.background = "#BDDEF7";
}

// 필드를 깨끗하게
function clear_field(fld) 
{
    fld.style.background = "#FFFFFF";
}

function trim(s)
{
	var t = "";
	var from_pos = to_pos = 0;

	for (i=0; i<s.length; i++)
	{
		if (s.charAt(i) == ' ')
			continue;
		else 
		{
			from_pos = i;
			break;
		}
	}

	for (i=s.length; i>=0; i--)
	{
		if (s.charAt(i-1) == ' ')
			continue;
		else 
		{
			to_pos = i;
			break;
		}
	}	

	t = s.substring(from_pos, to_pos);
	//				alert(from_pos + ',' + to_pos + ',' + t+'.');
	return t;
}

// 자바스크립트로 PHP의 number_format 흉내를 냄
// 숫자에 , 를 출력
function number_format(data) 
{
	
    var tmp = '';
    var number = '';
    var cutlen = 3;
    var comma = ',';
    var i;
   
    len = data.length;
    mod = (len % cutlen);
    k = cutlen - mod;
    for (i=0; i<data.length; i++) 
	{
        number = number + data.charAt(i);
		
        if (i < data.length - 1) 
		{
            k++;
            if ((k % cutlen) == 0) 
			{
                number = number + comma;
                k = 0;
			}
        }
    }

    return number;
}

// E-Mail 검사
function email_check(email) 
{
    if (email.value.search(/(\S+)@(\S+)\.(\S+)/) == -1)
        return false;
    else
        return true;
}

// 주민등록번호 검사
function jumin_check(j1, j2) 
{
    if (j1.value.length<6 || j2.value.length<7)
        return false;

    var sum_1 = 0;
    var sum_2 = 0;
    var at=0;
    var juminno= j1.value + j2.value;
    sum_1 = (juminno.charAt(0)*2)+
            (juminno.charAt(1)*3)+
            (juminno.charAt(2)*4)+
            (juminno.charAt(3)*5)+
            (juminno.charAt(4)*6)+
            (juminno.charAt(5)*7)+
            (juminno.charAt(6)*8)+
            (juminno.charAt(7)*9)+
            (juminno.charAt(8)*2)+
            (juminno.charAt(9)*3)+
            (juminno.charAt(10)*4)+
            (juminno.charAt(11)*5);
    sum_2=sum_1%11;

    if (sum_2 == 0) 
	{
        at = 10;
    } 
	else 
	{
        if (sum_2 == 1) 
            at = 11;
		else 
            at = sum_2;
    }
    att = 11 - at;
    if (juminno.charAt(12) != att) 
	{
        return false;
    }

    return true
}

// 새 창
function popup_window(url, winname, opt)
{
    window.open(url, winname, opt);
}

// 우편번호 창
function popup_zip(frm_name, frm_zip1, frm_zip2, frm_addr, rel_dir, top, left)
{
	url = rel_dir+'/zip.php?frm_name='+frm_name+'&frm_zip1='+frm_zip1+'&frm_zip2='+frm_zip2+'&frm_addr='+frm_addr;
	opt = 'scrollbars=yes,width=416,height=250,top='+top+',left='+left;
	popup_window(url, "winzip", opt);
}


// 폼메일 창
function popup_formmail(url)
{
	opt = 'scrollbars=yes,width=417,height=385,top=10,left=20';
	popup_window(url, "wformmail", opt);
}

// 큰이미지 창
function popup_large_image(it_id, width, height)
{
	var top = 10;
	var left = 10;
	url = "large_image.php?it_id=" + it_id;
	width = width + 50;
	height = height + 50;
	opt = 'scrollbars=yes,width='+width+',height='+height+',top='+top+',left='+left;
	popup_window(url, "largeimage", opt);
}

// , 를 없앤다.
function no_comma(data)
{
	var tmp = '';
    var comma = ',';
    var i;

	for (i=0; i<data.length; i++)
	{
		if (data.charAt(i) != comma)
		    tmp += data.charAt(i);
	}
	return tmp;
}

// 삭제 검사 확인
function del(href) 
{
    if(confirm("한번 삭제한 자료는 복구할 방법이 없습니다.\n\n정말 삭제하시겠습니까?")) 
        document.location.href = href;
}

// 쿠키 입력
function set_cookie(name, value, expirehours) 
{
	var today = new Date();
	today.setTime(today.getTime() + (60*60*1000*expirehours));
	document.cookie = name + "=" + escape( value ) + "; path=/; expires=" + today.toGMTString() + ";";
}

// 쿠키 얻음
function get_cookie(name) 
{
    var find_sw = false;
    var start, end;
    var i = 0;

	for (i=0; i<= document.cookie.length; i++)
	{
		start = i;
		end = start + name.length;

		if(document.cookie.substring(start, end) == name) 
		{
			find_sw = true
			break
		}
	}

    if (find_sw == true) 
	{
        start = end + 1;
        end = document.cookie.indexOf(";", start);

        if(end < start)
            end = document.cookie.length;

        return document.cookie.substring(start, end);
    }
    return "";
}

// 쿠키 지움
function delete_cookie(name) 
{
	var today = new Date();

	today.setTime(today.getTime() - 1);
	var value = getCookie(name);
	if(value != "")
		document.cookie = name + "=" + value + "; path=/; expires=" + today.toGMTString();
}

// TEXTAREA 사이즈 변경
function textarea_size(fld, size)
{
	var rows = parseInt(fld.rows);

	rows += parseInt(size);
	if (rows > 0) {
		fld.rows = rows;
	}
}