function isNullOrEmpty(string){
    return (typeof(string) == typeof(undefined) || string == null || string == "");
}

function isNull(object){
    return object == null || object == undefined;
}

function isInteger(string){
    var numericChars = "0123456789";
    var result=true;

    for (i = 0; i < string.length && result == true; i++) 
    { 
        if (numericChars.indexOf(string.charAt(i)) == -1)
            result = false;
    }
    return result;
}

function _(msgid){
    var msgstr = "";
    try {
        msgstr = window.CURRENT_LANGUAGE[msgid];
    }
    catch(e){
    }
    if(isNullOrEmpty(msgstr)){
        msgstr = msgid;
    }
    return msgstr;
}

var LANG_EN = {
};

window.CURRENT_LANGUAGE = LANG_EN;