Javascript 如何将数组中的第一个变量设为默认值

我有一个使用onClick生成随机引号的脚本。然而，我需要的是一个特定的报价作为默认打开。之后，onclick将生成随机结果。以下是到目前为止我得到的信息：

<button onClick="quotes()">ASK then CLICK</button>
<br>
<textarea id="txtbox" style="width:170px;  readonly></textarea>
<br>
<br>
<script>
    function quotes() {

        var aquote = new Array;
        aquote[0] = " This SHOULD ALWAYS APPEAR FIRST ";
        aquote[1] = "Think twice about this ";
        aquote[2] = "Save your money.... ";
        aquote[3] = "Real Estate is good ";
        aquote[4] = "Visit the Islands "

        rdmQuote = Math.floor(Math.random() * aquote.length);
        document.getElementById("txtbox ").value = aquote[rdmQuote];
    }
    window.onload = quotes;
</script>

询问，然后单击


您唯一的问题是语法错误。您在
getElementById（“txtbox”）
中有一个额外的空格，在textarea的样式声明中缺少一个引号，否则代码将使用：

document.getElementById("txtbox").value = aquote[rdmQuote];

您可以在HTML中显示默认文本，然后使用随机引号更改textarea的值

HTML

<textarea id="txtbox">This SHOULD ALWAYS APPEAR FIRST</textarea>

您可以像这样重新组织代码，并为随机报价或固定报价创建专用函数：

<button onClick="randomQuote()">ASK then CLICK</button>
...
<script>
var quotes = [
    " This SHOULD ALWAYS APPEAR FIRST ",
    "Think twice about this ", 
    "Save your money.... ", 
    "Real Estate is good ";
    "Visit the Islands "
];

function randomQuote()
{
    showQuote(Math.floor(Math.random() * quotes.length));
}

function showQuote(index) {
    document.getElementById("txtbox ").value = quotes[index];
}

window.onload = function() {
    showQuote(0);
};
</script>

询问，然后单击
...
变量引号=[
“这应该总是先出现”，
“对此三思而后行”，
“省钱……”，
“房地产好”；
“参观岛屿”
];
函数randomQuote（）
{
showQuote（Math.floor（Math.random（）*quotes.length））；
}
函数showQuote（索引）{
document.getElementById（“txtbox”）.value=quotes[index]；
}
window.onload=函数（）{
showQuote（0）；
};
OP希望首先加载
aNote[0]
，但此答案没有解决此问题。
<button onClick="randomQuote()">ASK then CLICK</button>
...
<script>
var quotes = [
    " This SHOULD ALWAYS APPEAR FIRST ",
    "Think twice about this ", 
    "Save your money.... ", 
    "Real Estate is good ";
    "Visit the Islands "
];

function randomQuote()
{
    showQuote(Math.floor(Math.random() * quotes.length));
}

function showQuote(index) {
    document.getElementById("txtbox ").value = quotes[index];
}

window.onload = function() {
    showQuote(0);
};
</script>