检查文本框是否包含数字

Question

我目前在一个基于JavaScript和jQuery的数字助理网站上工作。 用户可以在文本框中输入问题或告诉助手一些事情，助手将以与输入有关的内容进行响应。 我打算实现的是检查文本框是否包含数字（标记），以及是否可以运行某种功能。 这个概念听起来很简单，但是我遇到了麻烦。 我一直在寻找一些东西，但似乎找不到任何适合我的代码的东西。

我将添加我的JavaScript和HTML的必要部分。 但是我警告您，代码很乱。

JavaScript：

// JavaScript Document
function submitted() {
    var srch = document.getElementById("srch");
    command();
    getPlaceHolder();
    srch.value = "";
}

function searchKeyPress(e) {
    e = e || window.event;
    if (e.keyCode == 13) {
        //document.getElementById('btn').click();
        submitted();
    }
}

function goBtn() {
    submitted();
}

function refreshBtn() {
    getWelcome();
}

function stClock() {
    window.setTimeout("stClock()", 1000);
    today = new Date();
    self.status = today.toString();
}

function getWelcome() {
    var ar = new Array(20)
    ar[0] = "What's on your mind?";
    ar[1] = "How can I help?";
    ar[2] = "Anything you need help with?";
    ar[3] = "Ask me anything";
    ar[4] = "What can I help you with?";
    ar[5] = "What would you like me to do?";
    ar[6] = "What can I do for you?";
    ar[7] = "Need help with anything?";
    ar[8] = "Need someone to talk to?";
    ar[9] = "I'm here to help";
    ar[10] = "Anything you need to know?";
    ar[11] = "How else can I help?";
    ar[12] = "What can I do now?";
    ar[13] = "Need anything?";
    ar[14] = "Any problems you need solving?";
    ar[15] = "Hello, how do you do?";
    ar[16] = "Hi there";
    ar[17] = "Hi, I'm aurum";
    ar[18] = "Hello there";
    ar[19] = "How do you do?";
    var now = new Date();
    var sec = now.getSeconds();
    document.getElementById('output').innerHTML = ar[sec % 20];
}

function getPlaceHolder() {
    var ar = new Array(20)
    ar[0] = "What's on your mind?";
    ar[1] = "How can I help?";
    ar[2] = "Anything you need help with?";
    ar[3] = "Ask me anything";
    ar[4] = "What can I help you with?";
    ar[5] = "What would you like me to do?";
    ar[6] = "What can I do for you?";
    ar[7] = "Need help with anything?";
    ar[8] = "Need someone to talk to?";
    ar[9] = "I'm here to help";
    ar[10] = "Anything you need to know?";
    ar[11] = "How else can I help?";
    ar[12] = "What can I do now?";
    ar[13] = "Need anything?";
    ar[14] = "Any problems you need solving?";
    ar[15] = "Hello, how do you do?";
    ar[16] = "Hi there";
    ar[17] = "Hi, I'm aurum";
    ar[18] = "Hello there";
    ar[19] = "How do you do?";
    var now = new Date();
    var sec = now.getSeconds();
    document.getElementsByName('srch')[0].placeholder=ar[sec % 20];
}

function command() {
        var srchVar = document.getElementById("srch");
        var srch = srchVar.value;
        var t = srch;
        var outputElement = document.getElementById('output');
        if (srch == '') {
            outputElement.innerHTML = "How can I help you, if you don't say anything?";
        }
        else if (srch.indexOf('about') != -1) {
            outputElement.innerHTML = "Hello, I'm Aurum. I was designed by Omar Latreche to help people answer their questions. However, I also like to talk to people aswell as answer their questions.";
        }
        else if (srch.indexOf('time') != -1) {
            outputElement.innerHTML = 'The current time according to your computer is' + ShowTime(new Date());
        }
        else {
            if (confirm("I am sorry but for some reason I don't understand. You could either repeat that or would you like to search Google for that instead?") == true) {
                window.open('https://www.google.co.uk/#q=' + srch, '_blank');
            }
            else { /* Nothing */ }
        }
    }
    //Show time in 12hour format
var ShowTime = (function() {
    function addZero(num) {
        return (num >= 0 && num < 10) ? "0" + num : num + "";
    }
    return function(dt) {
        var formatted = '';
        if (dt) {
            var hours24 = dt.getHours();
            var hours = ((hours24 + 11) % 12) + 1;
            formatted = [formatted, [addZero(hours), addZero(dt.getMinutes())].join(":"), hours24 > 11 ? "PM" : "AM"].join(" ");
        }
        return formatted;
    };
})();

和HTML：

<!DOCTYPE html>
<html>
<body onload="getWelcome(); getPlaceHolder();">
    <div class="output" id="output">
        An error has occoured. Please make sure you have JavaScript enabled in your browser.
    </div>
    <div class="cont">
        <div class="ui-widget">
            <div class="search-cont">
                <input class="search-field" id="srch" name="srch" onkeypress="searchKeyPress(event);" placeholder="ask me anything" spellcheck="false"> <input class="refresh" onclick="refreshBtn()" title="Refresh the conversation" type="button"> <input class="go" onclick="goBtn()" type="button">
            </div>
        </div><br>
    </div>
</body>
</html>

我非常感谢提供的任何帮助。 谢谢，奥马尔。

PS。 我为很长的一段文字表示歉意，但这是我想去解释我所需要的唯一方法。

PPS。 如果您需要关于我的项目的更多信息，以防万一，URL为http://omarlatreche.tk/aurum/

Answer 1

你能解释一下这句话吗？

document.getElementById('output').innerHTML = [0].innerHTML=ar[sec % 20];

不应该

document.getElementById('output').innerHTML = ar[sec % 20];

Answer 2

这是我想检查数字的功能：

function checkNum() {
    text = document.getElementById('srch').value;
    valArr = document.getElementById('srch').value.split(' ');

    for (i = 0; i < valArr.length; i++) {
        if (isNaN(valArr[i])==false) {
            alert("Number found");
        }
    }
}

这是JSFiddle演示

我在goBtn（）函数中调用了该函数。