var body = document.body,  

    attries = body.attributes,

    arr     = [];

for(var i=0, len=attries.length; i<len; i++){

    var attr = attries[i];

    if(attr.specified){  

        var attr_name = attr.nodeName,  

            attr_val  = attr_name === "style" ? body.style.cssText  

                                              : attr.nodeValue;

        arr.push(attr_name  + '="' + attr_val   + '"');

    }

}

var x = arr.join(" ");

document.