function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

function MM_nbGroup(event, grpName) { //v3.0
  var i,img,nbArr,args=MM_nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
      img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
        if (!img.MM_up) img.MM_up = img.src;
        img.src = img.MM_dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.MM_nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = (img.MM_dn && args[i+2]) ? args[i+2] : args[i+1];
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.MM_nbOver.length; i++) {
      img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
  } else if (event == "down") {
    if ((nbArr = document[grpName]) != null)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = img.MM_dn = args[i+1];
      nbArr[nbArr.length] = img;
  } }
}

//°Ô½ÃÆÇ °Ë»ö üũ ÇÔ¼ö
function BBS_SEARCH() {
	var srh = document.bbs_srh;

	if (srh.word.value == "") {
		alert("°Ë»ö¾î¸¦ ÀÔ·ÂÇϼ¼¿ä");
		srh.word.focus();
		
		return;
	}

	srh.submit();
}

//¸ÞÀÏ ÁÖ¼Ò ÀûÇÕ¼º ¿©ºÎ üũ ÇÔ¼ö
function checkEM(str) {
	var len = str.length;
	
	for(i=0;i<len;i++) {
	    var val="`!#$%^&*()+|=\\?/[]{};:\"\'><,";
	    if(val.indexOf(str.substring(i,i+1))>=0) {
			alert("¸ÞÀÏ ÁÖ¼Ò¿¡ Ư¼ö¹®ÀÚ³ª °ø¹éÀ» ³ÖÀ¸¸é ¾ÈµË´Ï´Ù. ´Ù½Ã ÀÔ·ÂÇϼ¼¿ä.");
			
			return false;
	    }
	}

	if(len != 0 && (str.indexOf("@")==-1 || str.indexOf(".")==-1)){
		alert ("¸ÞÀÏ ÁÖ¼Ò¸¦ Á¤È®ÇÏ°Ô ÀÔ·ÂÇØ ÁÖ¼¼¿ä.");
		
		return false;
	}
	
	//v = str.substring(len, len-1);
	//document.write (v);
	if((str.substring(str.indexOf("@")+1, str.indexOf("@")+2) == ".") || (str.substring(len, len-1) == ".")) {
		alert ("¸ÞÀÏ ÁÖ¼Ò¸¦ Á¤È®ÇÏ°Ô ÀÔ·ÂÇØ ÁÖ¼¼¿ä.");
		
		return false;
	}

	return true;
}

// ¿µ¹®¼ýÀÚÀÎÁö °Ë»ç: CÀÇ isalnum() ÇÔ¼ö¿Í ´ëÀÀ       
function isalnum(str)       
{       
    var str0 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";       
       
    for (i=0; i< str.length; i++)       
    {       
        ch = str.charAt(i);       
        for (j=0;  j< str0.length; j++)       
              if (ch == str0.charAt(j))       
                    break;       
        if (j == str0.length)            // ¿µ¹®¼ýÀÚ°¡ ¾Æ´Ñ°ÍÀÌ ÀÖÀ½       
              return false;       
      }       
      return true;       
}

// ¼ýÀÚÀÎÁö °Ë»ç       
function isnumeric(str)       
{       
    for (i=0; i< str.length; i++)       
    {       
        ch = str.charAt(i);       
        if (ch < "0" || ch > "9")       
              return false;        
    }       
    return true;        
}

// »ç¿ëÀÚ ID °Ë»ç       
function check_userid(form)       
{       
    var user_id = form.mid.value;       
    if ( user_id == "" )       
    {       
        alert("»ç¿ëÀÚ ID¸¦ ÀÔ·ÂÇÏ¿© ÁֽʽÿÀ");       
        form.mid.focus();       
        return false;       
    }       
       
    // IDÀÇ Àû¹ý¼º °Ë»ç 1: Ư¼ö¹®ÀÚ Æ÷ÇÔ ¿©ºÎ       
    if ( isalnum(user_id) == false )       
    {       
        alert("»ç¿ëÀÚ ID¿Í ¾ÏÈ£´Â ¿µ¹®ÀÚ³ª ¼ýÀÚÀÇ Á¶ÇÕ¸¸ÀÌ °¡´ÉÇÕ´Ï´Ù.");        
        form.mid.focus();       
        return false;       
    }       
       
    // IDÀÇ Àû¹ý¼º °Ë»ç 2: ¼ýÀÚ ID ÀÎÁö °Ë»ç       
    if ( isnumeric(user_id) == true )       
    {       
        alert("¼ýÀڷθ¸ ±¸¼ºµÈ ID´Â Çã¿ëµÇÁö ¾Ê½À´Ï´Ù.");        
        form.mid.focus();       
        return false;       
    }       
       
    // ID°¡ ¼ýÀÚ·Î ½ÃÀÛÇÏ´ÂÁö °Ë»ç       
    ch = user_id.charAt(0);       
    if (ch >= "0" && ch <= "9")       
    {       
        alert("ID´Â ¿µ¹®ÀÚ·Î ½ÃÀÛÇØ¾ß ÇÕ´Ï´Ù.");       
        form.mid.focus();       
        return false;       
    }       
       
    //    ID°¡ 4Àڹ̸¸ÀÎÁö °Ë»ç       
    if ( user_id.length < 4 )       
    {       
        alert("ID´Â 4ÀÚ ÀÌ»óÀ̾î¾ß ÇÕ´Ï´Ù.");       
        form.mid.focus();       
        return false;       
    }       
    return true;       
}      

// Áֹεî·Ï¹øÈ£ °Ë»ç       
function check_ssn(form)       
{       
    var chk =0;       
    var ssn1 = form.ssn01.value;       
    var ssn2 = form.ssn02.value;       
       
    // Áֹεî·Ï¹øÈ£ÀÇ Ã¹¹ø° ÇÊµå °Ë»ç       
    if ( ssn1.length < 6 )       
    {       
        alert("Áֹεî·Ï¹øÈ£¸¦ ÀÔ·ÂÇÏ¿© ÁֽʽÿÀ.");       
        form.ssn01.focus();       
        return false;       
    }       
       
    // Áֹεî·Ï¹øÈ£ÀÇ Ã¹¹ø° ÇʵåÀÇ Àû¹ý¼º °Ë»ç       
    if ( isnumeric(ssn1) == false )       
    {       
        alert("Áֹεî·Ï¹øÈ£¸¦ Á¤È®È÷ ÀÔ·ÂÇÏ¿© ÁֽʽÿÀ.");       
        form.ssn01.focus();       
        return false;       
    }       
       
    // Áֹεî·Ï¹øÈ£ÀÇ µÎ¹ø° ÇÊµå °Ë»ç       
    if ( ssn2.length < 7 )       
    {       
        alert("Áֹεî·Ï¹øÈ£¸¦ ÀÔ·ÂÇÏ¿© ÁֽʽÿÀ.");       
        form.ssn02.focus();       
        return false;       
    }       
       
    // Áֹεî·Ï¹øÈ£ÀÇ µÎ¹ø° ÇʵåÀÇ Àû¹ý¼º °Ë»ç       
    if ( isnumeric(ssn2) == false)       
    {       
        alert("Áֹεî·Ï¹øÈ£¸¦ Á¤È®È÷ ÀÔ·ÂÇÏ¿© ÁֽʽÿÀ.");       
        form.ssn02.focus();       
        return false;       
    }       
       
      for (var i = 0; i <=5 ; i++){       
        chk = chk + ((i%8+2) * parseInt(ssn1.substring(i,i+1)))       
     }       
       
      for (var i = 6; i <=11 ; i++){       
            chk = chk + ((i%8+2) * parseInt(ssn2.substring(i-6,i-5)))       
     }       
       
       
      chk = 11 - (chk %11)       
      chk = chk % 10       
       
       
      if (chk != ssn2.substring(6,7))       
      {       
            alert ('À¯È¿ÇÏÁö ¾ÊÀº Áֹεî·Ï¹øÈ£ÀÔ´Ï´Ù.');       
            form.ssn02.focus();       
            return false;       
      }       
       
    return true;       
}