How to pass the variable value of JS to the ASP variable _javascript skill

ASP as the main page, external to a JS, I would like to know if you can call the ASP in JS variable value, if you can these values are how to pass the past?

I do, do not know is not right? In ASP here: <script type= "Text/javascript" src= Lpindex.js?jsid=trim (Request (' ID ')) ></script> And in JS yonder: location.href= ' Lmsg.asp?id=<%=trim (Request ("Jsid"))%> '; The result is that the resulting ASP variable is simply not available!

The best way is to set up a script code block in the ASP, with <%%> assignment, JS file can not use <%%>, because the ASP parser does not parse JS files, as follows:
HTML Code:

Copy Code code as follows:

<script type= "Text/javascript" >
var a= ' <%=trim (Request ("id"))%> ';///////this code block to be placed in front of Xxx.js
</script>
<script src= "Xxx.js" type= "Text/javascript" ></script>