music.qq.com.UserData.lib.pager.box.tips.popup.fixed.qmfl_portal.js

insertCSSLink: function (url, opts, callback) {
    var sid, doc, t, cssLink, head, docMode = document.documentMode;
    if (typeof opts == "string") {
        sid = opts;
    }
    opts = typeof opts == "object" ? opts : {};
    sid = opts.linkID || sid;
    doc = opts.doc || document;
    head = doc.getElementsByTagName("head")[0];
    cssLink = ((t = doc.getElementById(sid)) && (t.nodeName == "LINK")) ? t : null;
    if (!cssLink) {
        cssLink = doc.createElement("link");
        sid && (cssLink.id = sid);
        cssLink.rel = cssLink.rev = "stylesheet";
        cssLink.type = "text/css";
        cssLink.media = opts.media || "screen";
        head.appendChild(cssLink);
    }
    if (ua.ie || ua.opera) {
        MUSIC.event.addEvent(cssLink, ((ua.ie && ua.ie < 9) ? "readystatechange" : "load"), function () {
            if (!cssLink || ua.ie && ua.ie < 9 && !(cssLink.readyState == 'loaded' || cssLink.readyState == 'complete')) {
                return;
            }
            if (callback) {
                callback();
            }
        });
        setTimeout(function () {
            url && (cssLink.href = url);
        }, 0);
    } else if (ua.webkit) {
        var cn = document.styleSheets.length;
        url && (cssLink.href = url);
        var _times = 10;
        var fi = setInterval(function () {
            if (document.styleSheets.length > cn) {
                if (callback) {
                    callback();
                }
                clearInterval(fi);
            } else {
                _times--;
                if (_times < 0) {
                    if (callback) {
                        callback();
                    }
                    clearInterval(fi);
                }
            }
        }, 50);
    } else if (ua.firefox) {
        url && (cssLink.href = url);
        var _times = 10;
        var fi = setInterval(function () {
            try {
                cssLink.sheet.cssRules;
                if (callback) {
                    callback();
                }
                clearInterval(fi);
            } catch (e) {
                _times--;
                if (_times < 0) {
                    if (callback) {
                        callback();
                    }
                    clearInterval(fi);
                }
            }
        }, 50);
    } else {
        if (callback) {
            callback();
        }
    }
    return(MUSIC.userAgent.ie != 9 && cssLink.sheet) || cssLink;
}, insertStyleSheet: function (sheetId, rules) {
    var node = document.createElement("style");
    node.type = 'text/css';
    sheetId && (node.id = sheetId);
    document.getElementsByTagName("head")[0].appendChild(node);
    if (rules) {
        if (node.styleSheet) {
            node.styleSheet.cssText = rules;
        } else {
            node.appendChild(document.createTextNode(rules));
        }
    }
    return node.sheet || node;
}