/**
*
*  Base64 encode / decode
*  http://www.webtoolkit.info/
*
**/

var Base64 = {

	// private property
	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

	// public method for encoding
	encode : function (input) {
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;

		input = Base64._utf8_encode(input);

		while (i < input.length) {

			chr1 = input.charCodeAt(i++);
			chr2 = input.charCodeAt(i++);
			chr3 = input.charCodeAt(i++);

			enc1 = chr1 >> 2;
			enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
			enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
			enc4 = chr3 & 63;

			if (isNaN(chr2)) {
				enc3 = enc4 = 64;
			} else if (isNaN(chr3)) {
				enc4 = 64;
			}

			output = output +
			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

		}

		return output;
	},

	// public method for decoding
	decode : function (input) {
		var output = "";
		var chr1, chr2, chr3;
		var enc1, enc2, enc3, enc4;
		var i = 0;

		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

		while (i < input.length) {

			enc1 = this._keyStr.indexOf(input.charAt(i++));
			enc2 = this._keyStr.indexOf(input.charAt(i++));
			enc3 = this._keyStr.indexOf(input.charAt(i++));
			enc4 = this._keyStr.indexOf(input.charAt(i++));

			chr1 = (enc1 << 2) | (enc2 >> 4);
			chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
			chr3 = ((enc3 & 3) << 6) | enc4;

			output = output + String.fromCharCode(chr1);

			if (enc3 != 64) {
				output = output + String.fromCharCode(chr2);
			}
			if (enc4 != 64) {
				output = output + String.fromCharCode(chr3);
			}

		}

		output = Base64._utf8_decode(output);

		return output;

	},

	// private method for UTF-8 encoding
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";

		for (var n = 0; n < string.length; n++) {

			var c = string.charCodeAt(n);

			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}

		}

		return utftext;
	},

	// private method for UTF-8 decoding
	_utf8_decode : function (utftext) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;

		while ( i < utftext.length ) {

			c = utftext.charCodeAt(i);

			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224)) {
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else {
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}

		}

		return string;
	},



	encodeParams : function(f,paramList){
//alert("11");
			//alert(f.action);
			//alert(f.method);
			var frm= Base64.createForm("_hiddenForm_",f.method, f.action, "kkk");
			var coll = document.all.item(f.name);
			var enV;
			if(paramList == undefined ){
				paramList = new Array();
			}
			if(paramList.constructor != Array){
				paramList = new Array(paramList);
			}

			if (coll != null) {
				for (i=0; i<coll.length; i++) {
					//type radioÀ϶§´Â trueÀΰ͸¸ ÃëÇÑ´Ù.
					var itm = coll.item(i);
					if( itm.type.toUpperCase() == "BUTTON"){
						continue;
					}
					if( itm.type.toUpperCase() == "RADIO" && itm.checked == false){	
						continue;
					}
					//¸ðµÎ ¾Ïȣȭ ÇÑ´Ù.
					if( paramList.length == 0 ){
						enV = Base64.encode(itm.value);
						frm=Base64.addHidden(frm, itm.name, enV);
					}else{
						var size = paramList.length;
						var c = 0;
						enV = itm.value;
						for( ; c < size ; c++){
							//¸ñ·Ï¿¡ ÀÖÀ»°æ¿ì¸¸ ¾Ïȣȭ ÇÑ´Ù.
							//alert("name="+itm.name+",list="+paramList[c]);
							if( itm.name == paramList[c]){

								enV = Base64.encode(itm.value);
								//alert("¾Ïȣȭ"+enV);
								break;
							}
						}
						frm=Base64.addHidden(frm, itm.name, enV);
					}
				}
				document.insertBefore(frm);
			}
			//alert("222222");
			return frm;
	},

	 createForm : function(nm,mt,at,tg) {
		//alert("createForm");
	  var f=document.createElement("form");
	  f.name=nm;
	  f.method=mt;
	  f.action=at;
	//  f.target=tg;
	  return f;
	},

	 addHidden : function(f,n,v) {
	  var i=document.createElement("input");
	  i.type="hidden";
	  i.name=n;
	  i.value=v;
	  f.insertBefore(i);
	  return f;
	}


}