Javascript Json problem in IE9

Hy guys. In firefox and chrome this script alerts 'myclass', but does nothing in IE (i have version 9).

var a = {"class" : "myclass"};   
alert(a.class);

if I use cssclass instead of class, it is working in IE too.

var a = {"cssclass" : "myclass"};   
alert(a.cssclass);

This is very annoying. I开发者_如何学Gos the word 'class' reserved in IE, or what can be the problem, and what is the solution?

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I think class is a reserved keyword. Because objects are associative arrays in javascript you could also use this to access the value:

alert(a['class']);