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var $head = $("iframe").contents().find("head"); $head.append($("", { rel: "stylesheet", href: "file://path/to/style.css", type: "text/css" }));
var $head = $("iframe").contents().find("head"); $head.append($("", { rel: "stylesheet", href: "file://path/to/style.css", type: "text/css" }));