Iconv JavaScript

function win2unicode (str){
if (str == null){ return null;}
var result = "";
var o_code = "";
var i_code = "";
for (var I=0; I < str.length; I++){
i_code = str.charCodeAt(I);
if (i_code == 184){
o_code = 1105;
} else
if (i_code == 168){
o_code = 1025;
} else
if (i_code > 191 && i_code < 256){
o_code = i_code + 848; }
else {
o_code = i_code;
}
result = result + String.fromCharCode(o_code);
}


var koi2utf={
163:1105,
179:1025,
192:1102,
193:1072,
194:1073,
195:1094,
196:1076,
197:1077,
198:1092,
199:1075,
200:1093,
201:1080,
202:1081,
203:1082,
204:1083,
205:1084,
206:1085,
207:1086,
208:1087,
209:1103,
210:1088,
211:1089,
212:1090,
213:1091,
214:1078,
215:1074,
216:1100,
217:1099,
218:1079,
219:1096,
220:1101,
221:1097,
222:1095,
223:1098
};

function koi2unicode (str){
if (str == null){ return null;}
var result = "";
var o_code = "";
var i_code = "";
for (var I=0; I < str.length; I++){
i_code = str.charCodeAt(I);
if (koi2utf[i_code] != null){
o_code = koi2utf[i_code];
} else
if (i_code > 223 && koi2utf[i_code-32] != null)
{
o_code = koi2utf[i_code-32]-32;

} else {
o_code = i_code;
}
result = result + String.fromCharCode(o_code);
}

return result;
}



return result;
}