if ( navigator.platform.indexOf("Mac") === 0 )
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     // Additional styles for Mac
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      {
        var headID = document.getElementsByTagName("head")[0];        
        var cssNode = document.createElement("link");
        cssNode.type = "text/css";
        cssNode.rel = "stylesheet";
        cssNode.href = "http://www.mindbridge.se/bd_css/css/mac.css";
        cssNode.media = "screen";
        headID.appendChild(cssNode);
        }
    }