很简单的一JS,提示缺少对象

[remymartin]

<table width="100%" border="0">
<tr>
<td align="right">
返佣总金额</td>
<td align="left" colspan="3">
<asp:TextBox ID="txtCommision" runat="server" ReadOnly="True"></asp:TextBox></td>
</tr>
<tr>
[b]<td align="right">
导游返佣</td>
<td align="left" colspan="3">
<asp:TextBox ID="txtCP" runat="server" Width="48px"
onBlur="Conculate();"></asp:TextBox>% =
<asp:TextBox ID="txtCCommision" runat="server"></asp:TextBox>
</td> </tr>
<tr>
<td align="right">
旅行社返佣</td>
<td align="left" colspan="3">
<asp:TextBox ID="txtTP" runat="server" Width="48px"></asp:TextBox>% =
<asp:TextBox ID="txtTCommision" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td align="center" colspan="4">
<asp:Button ID="Button1" runat="server" Text="保存数据" /></td>
</tr>
</table>
<script type="text/javascript">
function Conculate()
{
var ct=parseDouble(document.getElementById("txtCommision").value);
var cp=parseDouble(document.getElementById("txtCP").value);
var tp=100-cp;
document.getElementById("txtTP").value=tp;
document.getElementById("txtCCommision").value=ct*cp/100;
document.getElementById("txtTCommision").value=ct*tp/100;
}
</script>

只要焦点一离开 txtCP 就提示"缺少对象"
报错是 var ct=parseDouble(document.getElementById("txtCommision").value); var cp=parseDouble(document.getElementById("txtCP").value);这两行
但只要把的值在JS中提前赋好,就不会报错了,
document.getElementById()中的值都是用复制粘贴搞上去的,
实在不懂,望JS高手赐教!!!
(调试环境 VS2005)

[remymartin]

谢谢各位,我试一下看看

[remymartin]

谢谢,成功了,非常感谢各位

[mail_ylei]

    
        <script type="text/javascript">
        function Conculate()
        {
            var txt=document.getElementById("txtCommision"); 
            if(txt.value.length>0)
            { 
                var ct=parseFloat(txt.value); 
                var cp=parseFloat(document.getElementById("txtCP").value);
                var tp=100-cp;
                document.getElementById("txtTP").value=tp;
                document.getElementById("txtCCommision").value=ct*cp/100;
                document.getElementById("txtTCommision").value=ct*tp/100;
            }
         
          } 
        </script>

[wen1512]

document.getElementById("txtCommision").value是空值，你可以在赋值前加个判断，如果为空就不赋值

[cuike519]

parseDouble在哪定义的？？？

[wszhoho]

ReadOnly="True"的问题

[CHJGirl]

var cp=parseDouble(document.getElementById("txtCP").value);
var tp=100-cp;
这一段有问题，你应判断一下。
if(cp!=null)
{
var tp=100-cp;

}

[remymartin]

改成了
<script type="text/javascript">
function Conculate()
{
var txt=document.getElementById("txtCommision");
if(txt.value!=null)
{
ct=parseDouble(txt.value);
var cp=parseDouble(document.getElementById("txtCP").value);
var tp=100-cp;
document.getElementById("txtTP").value=tp;
document.getElementById("txtCCommision").value=ct*cp/100;
document.getElementById("txtTCommision").value=ct*tp/100;
}
else
{
alert("null value");
}
}
</script>
这一行 ct=parseDouble(txt.value); 报错,崩溃....再等待

[wszhoho]

document.getElementById("<%=txtCommision.ClientID%>").value

[feelxym]

function Conculate()
{
var txt = document.getElementById("txtCommision");
if (txt.value != null && txt.value!="") {
ct = parseFloat(txt.value);
var cp = parseFloat(document.getElementById("txtCP").value);
var tp = 100 - cp;
document.getElementById("txtTP").value = tp;
document.getElementById("txtCCommision").value = ct * cp / 100;
document.getElementById("txtTCommision").value = ct * tp / 100;
}
else {
alert("null value");
}
}

[feelxym]

引用 5 楼 remymartin 的回复:

改成了
<script type="text/javascript">
function Conculate()
{
    var txt=document.getElementById("txtCommision");
    if(txt.value!=null)
    {
          ct=parseDouble(txt.value);
          var cp=parseDouble(document.getElementById("txtCP").value);
          var tp=100-cp;
        document.getElementById("txtTP").value=tp;
        document.getElementById("txtCCommision").value=ct*cp/100;
        document.getElementById("txtTCommision").value=ct*tp/100;
      }
    else
    {
          alert("null value");
      }
  }
        </script>
这一行 ct=parseDouble(txt.value); 报错,崩溃....再等待

JS中没有 parseDouble()这个函数 只有 parseFloat() 及parseInt() 函数

[aniubenben]

var ct=parseFloat( (document.getElementById("txtCommision").value == "") ?0.0:document.getElementById("txtCommision").value);
var cp=parseFloat( (document.getElementById("txtCP").value == "") ?0.0:document.getElementById("txtCP").value);

貌似只有parseFloat 方法，另外空值需要判断