creating and calling javascript function on the fly

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Hi,

I have a input button ,one div tag and one textbox as follow

<input type="button" runat="server" onclick="add();" />

 <input type="text" runat="server"  />

<div id="hhh"></div>


  <script type="text/javascript">


       function add() {

           document.getElementById("hhh").innerHTML = document.getElementById("TextBox1").value;
       }

   </script>

What i want is when suppose user write inside the texbox some script like

XML

<div > hi <script type="text/javascript">

                       alert();

          </script> </div>
</pre>   
and press the button alert msg should be called.

Posted 22-Jul-14 23:55pm

aassaahh

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Comments

Mohibur Rashid 23-Jul-14 6:05am

so, what is stopping you?

Kornfeld Eliyahu Peter 23-Jul-14 6:05am

Look for JavaScript eval function, and be prepared to evil!!!

aassaahh 23-Jul-14 6:22am

eval function is written in server side,i want user should write javascript code inside the textbox ,when wen user press enter ,the javascript function should get executed,

aassaahh 23-Jul-14 6:28am

user will be able to write any javascipt code in the texbox and will press the button,the code written inside the texbox should be get executed for eg ,if a user write a script as "<div> alert will be called without mouseover or without click <script>alert() </div>" and press the button ,alert should be called .

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Peter Leow · Answer 1 · 2014-07-23T00:32:00

Try this:

XML

<!DOCTYPE html>
<html>
<body>
    <input type="text" id="jssyntax" placeholder="type js here" value="">
    <button onclick="myFunction()">Run it</button>
<script>
function myFunction() {
    var syntax = document.getElementById("jssyntax").value;
    eval(syntax);
}
</script>
</body>
</html>