javascript:(function(){    function addRawCss(styles){ var newSS; if(document.createStyleSheet){ document.createStyleSheet("javascript:'" + styles.replace(/'/g,"\\'") + "'"); }else{ newSS=document.createElement("link"); newSS.rel="stylesheet"; newSS.href="data:text/css,"+escape(styles); document.documentElement.childNodes[0].appendChild(newSS); } } addRawCss("body { color: yellow !important; background-color: black !important; }");    })()