Unable to use Response.Write in VBScript - vbscript

Question

I am supporting an old Classic ASP application and I've read that the code we write within <% %> is VBScript and <% Response.Write "VBScript" %> is working fine , but when I write in the following format, Response.Write is not working
<SCRIPT LANGUAGE="VBScript">
Response.Write "VBScript"
</SCRIPT>
also Response.Write is not getting executed in an button click event
<SCRIPT LANGUAGE="VBScript" >
function B3_OnClick()
FORM1.T3.style.backgroundColor = "white"
FORM1.T4.style.backgroundColor = "white"
FORM1.T3.readOnly ="false"
FORM1.T4.readOnly ="false"
FORM1.style.backgroundColor = "white"
Response.Write("Hello World")
End function
</SCRIPT>
Can Anyone explain me why? Is there any substitute for Response.Write in that case..? Thanks in advance

Answer 1

This is because you are missing the runat="Server" attribute in the <script> tag.
<SCRIPT LANGUAGE="VBScript" runat="Server">
Response.Write "VBScript"
</SCRIPT>
Remember VBScript accessed through Classic ASP happens before the response is sent to the client. For an action such as clicking a button on the client to affect the server-side code it has to make a round-trip to the server. If you want to have server-side code affect client-side code you can inject code before returning a server response to the client.
<SCRIPT LANGUAGE="VBScript" >
function B3_OnClick()
FORM1.T3.style.backgroundColor = "white"
FORM1.T4.style.backgroundColor = "white"
FORM1.T3.readOnly ="false"
FORM1.T4.readOnly ="false"
FORM1.style.backgroundColor = "white"
MsgBox "<% Response.Write("Hello World") %>"
End function
</SCRIPT>
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