how to get clientid in external js file

[dhamodaran]

I can't get the clientid when using as external js file. Please help how to resolve this issue.

[Dormilich]

what clientid?

[dhamodaran]

Inline JS:
==========

<script>
function test()
{
var getValue = document.getElementById('<%=TextBox1.ClientID%>').value;
 
alert(getValue);
}
</script>
 
<asp:TextBox id="TextBox1" runat="server" />
<asp:Button value="submit" id="btnSubmit" onclientClick="test();" /> 

While button click event i can get the Textbox values. When i move into separate js file i can't get TextBox value.

How to do it ?

[Dormilich]

the JavaScript code is created by ASP. if you move it externally, ASP can’t set the ID value needed.