js添加css样式

function includeStyleElement(styles, styleId) {

 

    if (document.getElementById(styleId)) {

        return

    }

    var style = document.createElement("style");

    style.id = styleId;

    //这里最好给ie设置下面的属性

    /*if (isIE()) {

style.type = "text/css";

style.media = "screen"

}*/

    (document.getElementsByTagName("head")[0] || document.body).appendChild(style);

    if (style.styleSheet) { //for ie

        style.styleSheet.cssText = styles;

    } else { //for w3c

        style.appendChild(document.createTextNode(styles));

    }

}

var styles = "#div{ color:#FFFFFF }";

includeStyleElement(styles, "newstyle");




function includeLinkStyle(url) {

 var link = document.createElement("link");

 link.rel = "stylesheet";

 link.type = "text/css";

 link.href = url;

 document.getElementsByTagName("head")[0].appendChild(link);

}

 

includeLinkStyle("");