How to display split value of string in text box using classic ASP

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ASP

<INPUT name="EQN" id="EQN" type="text" onchange="ReloadPage()" size=10 value=<% =UCase(request("EQN")) %>> - 
<INPUT name="JBN" onchange="ReloadPage()" class="textbox" size=10 value=<% =UCase(request("JBN")) %>> - 
<INPUT name="TGN" onkeyup="SetFocuson()" class="textbox" size=10 maxlength="4" value=<% =UCase(request("TGN")) %>>

<%
TagNo=UCase(Request("EQN")) & "-" & UCase(Request("JBN")) & "-" &  UCase(Request("TGN"))%>

Example: TagNo='700SBM02-70281-35GW'
i want display result as 7000SBM02 IN 1ST textbox, 70281 in 2nd textbox, 35GWin 3rd textbox

What I have tried:

I have tried split function. but it is not working.
Please help me