I am writing a javascript inside java servlet to get
the function "alert", that is , when one trying to
modify two records at one time, error message like
"you can only modify one record at one time" comes out
in a new small window. then the servlet program will
be redirected to another servlet program. firt the
javascript function works well. but when i add one
piece of code
res.sendRedirect("/labexam/servlet/StudentEdit");
the javascript function doesn't work even it is
called.
the following is my code
out.println("<html>");
out.println("<head>");
out.println("<title>Student Edit Menu</title>");
out.println("</head>");
out.println("<body bgcolor=#ccffff>");
out.println("<h1 align = center><font size=5
color=green >"+courseid.toUpperCase()+": "+
course+"</h1>");
out.println("<p>");
out.println("<p>");
if (errorFlag == true) {// if there is error in
selection, set target=_self
out.println("<form
action=\"StudentEditModule1\" method=Get
Target=_self>");
System.out.println("errorflag is true");
}
else{
System.out.println("errorflag is false");
out.println("<form
action=\"StudentEditModule1\" method=Get
Target=_parent>");
}
out.println("<table align=center >");
out.println("<tr><td>");
out.println("<select name=\"action\">");
out.println("<option value=\"Add\">Add");
out.println("<option value=\"Modify\">Modify");
out.println("<option value=\"Delete\">Delete");
out.println("<option value=\"Upload\">Upload
File");
out.println("</select>");
out.println("</td>");
out.println("<td>");
out.println("<input type=\"submit\" value=\"Go\"
>");
out.println("</td>");
out.println("</tr>");
out.println("</table>");
out.println("</form>");
if (errorFlag==true) { // if there is error in
selection, pop up error message
System.out.println("the error message function
is called");
out.println("<script
language=\"JavaScript\">");
if(numOfSelection==0)
out.println("alert(\" At least one record needs to
be selected\")");
else // more than one record for modify
function
out.println("alert(\" Only one record can be
modified at one time\")");
out.println("</script>"); // end of javaScript
}
out.println("</body>");
out.println("</html>");
if (errorFlag ==true)
res.sendRedirect("/labexam/servlet/StudentEdit");
// close connection
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