如何在Javascript中获取此值？

Question

这是HTML代码:

<div id="CurrencyQuotePane">
    <div class="CurrencyQuote">
        <div class="column">
            <div class="form-label">Pair: </div><div>1/2</div>
            <div class="form-label padding-top">Spread: </div><div>385</div>
        </div>
        <div class="column">
            <div class="form-label">Rate: </div><div>1/2</div>
            <div class="form-label padding-top">High/Low: </div><div>2002.0/0.0055</div>
        </div>
    </div>
    <div class="clear"></div>
</div>

如果它不断变化,如何在Javascript中获得385？

这是我目前的javascript:

function getSpread(){
    var tag = iframe.contentDocument.getElementByClassName('SPREAD');
    var spread = Number(tag[1].innerHTML);
    return spread;
}

对不起,如果我对javascript一无所知,我是一个完整的新手.

Answer 1

把它改成这个:

<div class="column">
    <div class="form-label">Pair: </div><div>TEXT</div>
    <div class="form-label padding-top">SPREAD</div><div id="spreadval">385</div>
</div>


function getSpread(){
    var tag = iframe.contentDocument.getElementById('spreadval');
    return parseInt(tag.innerHTML);
}