javascript return by ajax does not work

Question

the requested page returns the following javascript by jsp:

<%!
String test = "hello world!!";
String test3 = "<script type=\"text/javascript\">document.getElementById(\"content\").setAttribute(\"style\",\"color:red\");</script>";
out.println(test3);
%>

and in the ajax page, i extracted the expression btw and uses

eval((e)())

in which e is the javascript returned, and the HTML is like:

<div id="content">
<p>hello world!</p></div>

but apparently the javascript returned does not work, is something wrong with the code? thanks by the way, i'm not allowed to use jQuery...

Due to security reasons, you should never use ´eval´ function — sdespont, Mar 25 '14 at 19:28
The bigger issue here is your writing JavaScript in server side code then passing it through eval. — Matt Lo, Mar 25 '14 at 19:29
Instead, you could load your script in a container with JQuery ´load´ function for example : https://api.jquery.com/load/ — sdespont, Mar 25 '14 at 19:30
what is the problem with the javascript? it returned correctly but just not work — user2810081, Mar 25 '14 at 20:34

score 0 · Answer 1 · answered Mar 25 '14 at 20:57

0

eval() takes in a single parameter: the Javascript code as a string, such as -

eval(e)

See http://www.w3schools.com/jsref/jsref_eval.ASP.

answered Mar 25 '14 at 20:57

Prasad Silva

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yes, i passed the javascript expression as a string to the eval(), but it doesn't work – user2810081 Mar 25 '14 at 21:00
What is the exact javascript expr you are trying to eval? – Prasad Silva Mar 25 '14 at 21:01
change the color of the element with id "content". – user2810081 Mar 25 '14 at 21:05
Assuming your expression is valid (you didn't post the -actual- JS only expr used with eval) and the HTML is valid, then it could be a browser issue: see http://stackoverflow.com/questions/6065609/document-getelementbyid-setattributestyle-not-working-in-internet-ex – Prasad Silva Mar 25 '14 at 21:10

javascript return by ajax does not work

1 Answers1