function _createLink(id, href){
    var link = document.createElement("LINK");
    link.id = id;
    link.rel = "stylesheet";
    link.type = "text/css";
    link.href = href;
    return link;
}

    var link = _createLink("idCSS", "css/_fullReport.css");
    link.onload = function(){
    pNode=document.querySelector('thead').innerHTML;
        window.print();
    }