How to Call Javascript function through CodeBehind(C#)

Yeah,It is easy to Call javascript function through codebehind by using
Attributes.Add to the button.

use this code..

Button1.Attributes.Add("onclick", "return callingfn()");

Consider javascript as follows

<script defer="defer" type="text/javascript" language="javascript">

function callingfn()

{

var objTextBox = document.getElementById('TextBox2');

objTextBox.value = "123";

return objTextBox.value();

}

</script>


whole code like this..

<html >

<head runat="server">

<title> Untitled Page</title>

<script defer="defer" type="text/javascript" language="javascript">
function
callingfn()

{

var objTextBox = document.getElementById('TextBox2');

objTextBox.value = "123"

return objTextBox.value();

}

</script>

</head>

<body>

<form id="form1" runat="server">

<div>

<table>

<tr>

<td>

<asp:TextBox ID="TextBox2" runat="server" > </asp:TextBox> </td>

</tr>

<tr>

<td align ="center"> <asp:Button ID="Button1" runat="server" Text="Button" />

</td>

</tr>

</table>

</div>

</form>

</body>

</html>

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