IndexOf not Supported in IE8 Browser

Question

I have cascaded dropdown in my application, cascaded using jquery, now my problem is it is working smoothly with IE9, Firefox, Opera and Safari but does not work with any of

Answer 1

The indexOf() method of Arrays is not implemented in IE < 9. As you're using jQuery you can make use of the $.inArray(), e.g.

var arr = ["foo", "bar", "baz"],
    bazIndex = $.inArray("baz", arr), // 2
    doesntExistIndex = $.inArray("notThere", arr); // -1

Here's the documentation: http://api.jquery.com/jQuery.inArray/.