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Editorial Team
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Asked: 2026-06-05T18:06:47+00:00

I have a simple asp page with a script including a function myFunction which

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I have a simple asp page with a script including a function myFunction which performs an addition of two numbers.

<head runat="server">
    <title></title>

     <script type="text/javascript">
         function myFunction() {
             var x = 10;
             var y = 5;
             x += y;
             var demoP = document.getElementById("demo")
             demoP.innerHTML = "x=" + x;
         }
    </script>

</head>
<body>
    <form id="form1" runat="server">
        
    <div>
               
    </div>
    <p>
        &nbsp;</p>
    <p id="demo">
        <asp:Button ID="Button1" runat="server"
            
            style="z-index: 1; left: 573px; top: 43px; position: absolute; height: 33px; width: 223px;" Text="Button" OnClick="myFunction()" />
    </p>
   
    </form>
</body>

When I run this page it shows an error that myFunction is not found.

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1 Answer

  1. Editorial Team

    OnClick is for server side callback. You want to invoke a client side function. So you should use OnClientClick instead:

    OnClientClick="myFunction()"
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