Ok, correct me if I'm wrong, but I take it that jQuery attr() does NOT work in IE. (marked wontfix) That being the case, what is the best alternative? For example, this works everywhere but IE:

jQuery(document).ready(function($) {

    $('.airsrc').each(function() {

        var $this = $(this);

        var src = $this.attr('data-websrc');

        $this.attr('src', src);

    });

});

Update: Whoops...I realize the issue. I actually had this inside an if statement based on a CSS3 media query. Media queries that aren't natively supported in IE8 or lower. The attr() definitely works!