数字运算在有的电脑上面允许正常，有的电脑显示结果为NaN,同台电脑有时正确，有时也显示NaN,代码在下面？急！！！

Question

if()这怎么有分号
我觉得还是和你从数据库拿的数据有关
最好parseInt一下再运行
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<script language=javascript>
function summer2(price,number)
{
var price=price;
var number=number;
if(price=='')
else
document.form1.sumprice2.value=(price*number).toFixed(3);
}
</script>
<form name=form1>
<input name="price2" type="text" class="table-input" id="price2" size="5">
<input name="num2" type="text" class="table-input" id="num2" onmouseout="summer2(document.form1.price2.value,document.form1.num2.value)" size="3"><input name="sumprice2" type="text" class="table-input"  onMouseOver="summer2(document.form1.price2.value,document.form1.num2.value)" id="sumprice2" size="6" readonly="false">
</form>

Answer 1

应该是按hbhbhbhbhb1021说的
有浮点的数用parseFloat试试
2个数一起做一下<script language=javascript>
function summer2(price,number)
{
var price=parseFloat(price);
var number=parseFloat(number);
if(price=='')
else if (!isNaN(price)&&!isNaN(number))
document.form1.sumprice2.value=(price*number).toFixed(3);
}
</script>

Answer 2

function summer2(price,number)
{
var price=parseFloat(price);
var number=parseFloat(number);
if(price!='')
return (price*number).toFixed(3);
}<input name="price2" type="text" class="table-input" id="price2" size="5">
<input name="num2" type="text" class="table-input" id="num2" size="3"><input name="sumprice2" type="text" class="table-input"  onMouseOver="this.value=summer2(document.form1.price2.value,document.form1.num2.value)" id="sumprice2" size="6" readonly="false">
这么写多好啊