Cannot call javascript from from servlet

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I have made dynamic buttons, using this code.

Java

out.print("<table>");
 out.print("<center><h1>Result:</h1></center>");
 rs=ps.executeQuery();                
 /* Printing column names */
 ResultSetMetaData rsmd=rs.getMetaData();
 out.print("<tr>");

 while(rs.next())
    {
     out.print("<td>"+rs.getString(2));              
     out.print("  <script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>");
     out.print(" <script src=\"js/index.js\"></script>");
     out.print("<button type=\"button\" onclick=friendnamebtn() id=\"btn_friends\">");
     out.print("Add" + rs.getString(2));
     out.print("</button>");
     out.print("</td></tr>");
 }
 out.print("</table>");

my javascript which is stored in index.js

JavaScript

function friendnamebtn()
{
     var friends = document.getElementById("btn_friends");
     alert(freinds+"add");
}

Actually when i click on that button, i want that id to be fetched and add that persons to the logged in person's friend list. I called the buttons event using javascript how do i connect those two people.

Posted 15-Oct-15 20:20pm

Member 9671810

Updated 15-Oct-15 20:44pm

Tomas Takac

v2

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_Amy · Accepted Answer · 2015-10-15T20:53:00

Solution 1

It may be because you are missing the Quote while declaring the javascript event. Can you try something like this?

Java

out.print("<button type=\"button\" onclick='javascript:return friendnamebtn(this)' id=\"btn_friends\">");

JavaScript

function friendnamebtn(sender)
{
     //write your code here
     return false;
}

Posted 15-Oct-15 20:53pm

_Amy

Comments

Member 9671810 16-Oct-15 3:07am

it's not working.. :/ why is this sender? and i have javascript code in separate file named index.js.

_Amy 16-Oct-15 3:12am

Then you should check your js file path. I think js path is not referenced properly. Try to hit F12 in chrome browser and go to console and check the error.

See: Debugging JavaScript[^].

Member 9671810 16-Oct-15 3:26am

thanks :) it's working :) now can you please suggest me if i want to connect those two people,(i mean i need to write database connectivity code. so can i write in javascript or do i need to use some other logic :))

_Amy 16-Oct-15 3:28am

Sure I can help. You can start a new thread related to your problem. And please state that what have you tried so far?

Member 9671810 16-Oct-15 3:30am

and hey, if i want to pass argument as onclick=friendnamebtn(rs.getString(2)) so that i can get there id or name. then???

Member 9671810 16-Oct-15 3:37am

@_Amy http://www.codeproject.com/Questions/1040301/link-two-contacts-make-friends-on-clicking-add-fri this is my new question's link.