Check if number is Decimal or not in JavaScript

Hi nauna,

Refer below sample.

HTML

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/json2/20130526/json2.min.js"></script>
<script type="text/javascript">
    function Validate() {
        var obj = {};
        obj.name = document.getElementById("txtName").value;
        obj.price = document.getElementById("txtPrice").value;
        $.ajax({
            url: '<%=ResolveUrl("~/WebService.asmx/GetCustomers") %>',
            data: JSON.stringify(obj),
            dataType: "json",
            type: "POST",
            contentType: "application/json; charset=utf-8",
            success: function (r) {
                if (obj.price % 1 != 0) {
                    alert(r.d);
                }
                else {
                    alert("Enter Price in decimal");
                }
            },
            error: function (response) {
                alert(response.responseText);
            },
            failure: function (response) {
                alert(response.responseText);
            }
        });
    }
</script>
<div>
    Name :<asp:TextBox runat="server" ID="txtName" />
    <br />
    Price :<asp:TextBox runat="server" ID="txtPrice" />
    <br />
    <asp:Button Text="Submit" runat="server" OnClientClick="Validate()" />
</div>

Code

C#

WebService.cs

using System.Web.Services;
using System.Web.Script.Services;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.Web.Script.Services.ScriptService]

public class WebService : System.Web.Services.WebService
{

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]

    public string GetCustomers(string name, decimal price)
    {
        return name + "\n" + price;
    }
}

VB.Net

Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols

<System.Web.Script.Services.ScriptService()> _
<WebService(Namespace:="http://tempuri.org/")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _

Public Class WebServiceVB

    Inherits System.Web.Services.WebService
    <WebMethod()>
<ScriptMethod(ResponseFormat:=ResponseFormat.Json)>

    Public Function GetCustomers(ByVal name As String, ByVal price As Decimal) As String
        Return name & vbLf & price
    End Function

End Class

Screenshot