Execute ASP.Net ImageButton Click event when Enter Key is pressed in TextBox using JavaScript

HI

I have 1 textbox and 1 imagebutton in page.aspx that i used script code for textbox that users should enter number otherwise show error these are my code

  <asp:Panel ID="Panel2" runat="server" DefaultButton="ImageButton3">
            
           <div id="behcode">
           <div id="divbehcodebtn">
            <asp:ImageButton ID="ImageButton3" runat="server" CssClass="imgbtnbehcode" 
                   onclick="ImageButton3_Click" OnClientClick = "return ValidateRange()" ForeColor="Transparent" AlternateText="" />
               <asp:Label ID="lblerror" runat="server" Text="enter number" ForeColor = "Red" style = "display:none"></asp:Label>


        </div>
         
        <div id="TBright">
        <asp:TextBox ID="txtNumeric" runat="server" onkeydown = "return isNumeric(event.keyCode);" onpaste = "return false;" CssClass="txtbehcode"></asp:TextBox>
  
        </div>

          function isNumeric(keyCode) {
              var r = ((keyCode >= 48 && keyCode <= 57) || keyCode == 8 || (keyCode >= 96 && keyCode <= 105))
               document.getElementById("<%=lblerror.ClientID %>").style.display = r ? "none" : "block";
            return r;
          }

Now when I enter number and press ENTER key It show error=="enter number"

When Enter Key is pressed I want to execute ImageButton3 Click event