Invalid regular expression flag b on property list sending AJAX request

I am trying to run the code:

runrequest = function () {
 $.ajax({
 url: 'ajax.php',
 success: function(data) {
  proccessrequest(true,eval(data));
  },
 error: function(data) {
  proccessrequest(false,eval(data));
  }
 });
 }开发者_开发问答

For some reason whenever I run this code Firebug gives me the error:

invalid regular expression flag b
},

This is referring to the }, after the success function. I am clueless of why this wouldn't work.

EDIT: The return data is ajax is JSON. The json is wrapped in parentheses

---

You're most likely getting an error back. The error message has the invalid expression.

For example if your error contains bold Warning: < /b > then there it is.

---

The line number is off here, more likely your error is eval(data), and that data has something like:

var regex = /expr/b

in there, which isn't a valid flag.