Trying to add style tag using javascript (innerHTML in IE8)

This doesn't work in IE8. I think it's the innerHTML that causes the problem. How to solve?

// jQuery plugin
(function( $ ){

    $.fn.someThing = function( options ) {  

        var d = document,
            someThingStyles = d.createElement('style');

        someThingStyles.setAttribute('type', 'text/css');
        someThingStyles.innerHTML = " \
        .some_class {overflow:hidden} \
        .some_class > div {width:100%;height:100%;} \
        ";
        d.getElementsByTagName('head')[0].appendChild(someThingStyles);

        });

    };

})( jQuery );