price* number= count

页面有价格，数量，如果其中价格或者数量变化时合计价格变动

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="SelectCourseSetting_test" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <div style="float: left; width: 98%; padding-left: 8px">
                <asp:TextBox ID="txtBuyNumber" runat="server" MaxLength="7" onkeyup="this.value=this.value.replace(/[^0-9]/g,'');if(this.value<=0){this.value='';}CountValue();"
                    onpaste="this.value=this.value.replace(/[^0-9]/g,'');CountValue();">
                </asp:TextBox>
                <asp:RequiredFieldValidator ID="RequiredFieldValidator8" runat="server" ControlToValidate="txtBuyNumber"
                    ErrorMessage="请输入请购数量">*</asp:RequiredFieldValidator>
                <asp:TextBox ID="txtPrice" runat="server" Width="120px" MaxLength="7" onkeyup="this.value=this.value.replace(/[^0-9,\.?]/g,'');CountValue();"
                    onpaste="this.value=this.value.replace(/[^0-9,\.?]/g,'');CountValue();" Text =0>
                </asp:TextBox>
                <asp:Label ID="txtCount" runat="server" EnableViewState="true" ReadOnly="True" Width="120px"></asp:Label>
            </div>
            <br />
            <br />
        </div>
    </form>

    <script type="text/javascript">
      function CountValue()
    {
        var txtPrice=document.getElementById('<%=txtPrice.ClientID%>');
        var txtBuyNumber=document.getElementById('<%=txtBuyNumber.ClientID %>');
        var price=new Number(txtPrice.value);
        var number=new Number(txtBuyNumber.value);
        if(!isNaN(price) && !isNaN(number))
        {
           document.getElementById('<%=txtCount.ClientID%>').innerText=Math.round(price*number*100)/100;
        }
        else
        {        
            alert("请输入正确的预估单价");
            txtPrice.focus();
        }
    }
    </script>

</body>
</html>

posted @ 2007-09-04 14:32  jhtchina  阅读(186)  评论(0)    收藏  举报