我正在尝试在 js 中计算一个简单的乘法，如下所示：
A * B = C
D * E = F
G * H = I
总计 = C + F + I
然而，总数比预期的要大得多。我的乘法有问题还是我从页面中读取的值不正确？
下面是我的代码：
<html>
<head>
<script>
calculate = function(totalElement)
{
if (totalElement)
{
var calculation = '';
var overall = '';
var fields = new Array();
var theElement = document.getElementById(totalElement);
var userInputs = myform.elements;
var the_type = '';
for (var f = 0; f < userInputs.length; f++)
{
if (userInputs[f].className=='special_value')
{
if(userInputs[f].value != "")
{
document.getElementById("price4").value+=+userInputs[f].value;
}
}
}
}
}
</script>
</head>
<body>
<form name="myform">
A<input onKeyPress="calculate('total');" onBlur="calculate('total');" class="special_value" value="" type="text" name="price">
B<input onKeyPress="calculate('total');" onBlur="calculate('total');" class="special_value" type="text" value="" name="price2">
C<input onKeyPress="calculate('total');" onBlur="calculate('total');" class="special_value" type="text"value="" name="price4" id="price4"> <Br/>
D<input onKeyPress="calculate('total');" onBlur="calculate('total');" class="special_value" value="" type="text" name="price5">
E<input onKeyPress="calculate('total');" onBlur="calculate('total');" class="special_value" type="text" value="" name="price6">
F<input onKeyPress="calculate('total');" onBlur="calculate('total');" class="special_value" type="text"value="" name="price7" id="price7"> <Br/>
Total<input class="special_value" value="" id="total" type="text" name="total"> <Br/>
<!-- <div id="total"></div> -->
<input onClick="calculate('total');" type="button" name="button" value="re-calculate">
</form>
</body>
</html>