Programming error

import javax.servlet.RequestDispatcher;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class ModuleServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><head>");
RequestDispatcher dispatcher = request.getRequestDispatcher("C:/jsdk2.0/examples/function.js");
dispatcher.forward(request, response);

out.println("<title>Client Forms</title></head><body>");

out.println("<h2>Enter Your Name and Email</h2>");
out
.println("<form name=\"entryForm\" onSubmit=\" return CheckEmail(this.email.value)\">");
out.println("<table border=\"0\"><tr><td valign=\"top\">");
out
.println("First and last name: </td> <td valign=\"top\"><input type=\"text\" name=\"name\" size=\"20\"></td></tr>");
out.println("<tr><td valign=\"top\">");
out
.println("Email: </td> <td valign=\"top\"><input type=\"text\" name=\"email\" size=\"20\"></td>");
out
.println("<tr><td valign=\"top\"><input type=\"submit\" value=\"Submit\" ></td>");
out.println("</tr></table></form>");

out.println("</body></html>");

} //end doGet
}

How to include function.js in servlet page using RequestDispatcher please reply me??

Here is the function.js code

functions.js
<script language="JavaScript">

function CheckEmail(email)
{
var firstchunk,indx,secondchunk

if (email == ""){
alert("Please make sure you have entered a valid email before submitting the info.")

return false
}

//get the zero-based index of the "@" character
indx = email.indexOf("@")

//if the string does not contain an @ then then return true
if (indx == -1 ){

alert("Please make sure you have entered a valid email before submitting the info.")

return false
}

//if the first part of email is < 2 chars and second part < 7 chars
//(arbitrary but workable criteria) then reject the input address

firstchunk = email.substr(0,indx) //up to but not including the "@"

//start at char following the "@" and include up to end of email addr
secondchunk = email.substr(indx + 1)

//if the part following the "@" does not include a period "." then
//also return false
if ((firstchunk.length < 2 ) || (secondchunk.length < 7) ||
(secondchunk.indexOf(".") == -1)){

alert("Please make sure you have entered a valid email before submitting the info.")

return false
}

//the email was okay; at least it had a @, more than 1 username chars,
//more than 6 chars after the "@", and the substring after the "@"
// contained a "." char

return true

}

function CreateWindow(uri) {

var newWin = window.open(uri,'newwin1','width=500,height=400,resizable,scrollable,scrollbars=yes');
newWin.focus();

}

</script>
What is the meaning of window open???

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