我有一个函数,应该从网站上获取所有的输入,将它们的值乘以它们的数量相加,然后用结果替换 中的字符串。问题在于该函数只执行一次,有时根本不执行。它的代码如下:
function calcTotal() {
var inputs = document.getElementsByTagName("input");
var total = 0;
var priceString = null;
var e = null;
var price = null;
for (var i = 0; i < inputs.length; i++) {
e = inputs[i].value;
priceString = "hidden_" + inputs[i].name;
if (e.match(/[0-9\.]/)) {
var price = document.getElementById(priceString).innerHTML;
total = total + parseFloat(e) * parseFloat(price);
}
}
var totalString = document.getElementById("total");
var stringToDisplay = total.toFixed(2);
totalString.innerHTML = stringToDisplay.toString();
}
这个函数应该替换掉这个span标签:<span id="total">0.00</span>
每当输入框发生变化时,这个函数会被调用:
<?php foreach($allPremium as $premiumItem){?>
<?php $ceny[$premiumItem->type]=$premiumItem->price;?>
<div class="premium-pack-item">
<?php echo $premiumItem->name;?>
<br />
<?php echo $premiumItem->description;?>
<br />
<?php echo "€ ".number_format($premiumItem->price, 2);?>
<br />
<span id="hidden_amount_<?php echo $premiumItem->type;?>" style="display:none"><?php echo $premiumItem->price;?></span>
<input onkeypress="calcTotal()" type="number" size=1 name="amount_<?php echo $premiumItem->type;?>">
</div>
<?php }?>
你能解释一下我哪里出了错吗?