1 var turbo = turbo || {}; 2 var W3C = document.addEventListener ? true : false; 3 var doc = document, html = document.documentElement; 4 var readyList = []; 5 turbo.ready = function(fn) { 6     //不管是哪个分支，只要触发过一次ready事件readyList就会为null 7     if (readyList) { 8         readyList.push(fn); 9     } else {10         fn();11     }12 };13 function fireReady() {14     if (readyList && readyList.length) {15         for (var i = 0, len = readyList.length; i < len; i++) {16             var fn = readyList[i];17             fn();18         }19     }20     readyList = null;21 }22 23 function doScrollCheck() {24     try {25         html.doScroll(‘left‘);26         fireReady();27     } catch (e) {28         setTimeout(doScrollCheck, 50);29     }30 }31 32 var ready = W3C ? "DOMContentLoaded" : "readystatechange";33 //由于firefox3.6不支持readyState，则在不支持readyState的时需手动赋值给它34 if (!doc.readyState) {35     //如果doc.body已存在则说明domcontentloaded了，将doc.readySate设置为complete36     var readyState = doc.readySate = doc.body ? "complete" : "loading";37 }38 39 if (doc.readyState == ‘complete‘) {40     fireReady();41 } else {42     $.bind(doc, ready, function() {43         if (W3C || doc.readyState == ‘complete‘) {44             fireReady();45             //firefox3.6,我觉得这里设不设置都行，因为这里已经用不到了doc.readyState了46             if (readyState) {47                 doc.readyState = ‘complete‘;48             }49         }50     })51     //ie下使用doScroll，尽量提前触发ready，此方法只在非iframe下的页面有效52     var top = false;53     try {54         top = doc.frameElement == null && doc.documentElement;55     } catch (e) {}56     if (top && top.doScroll) {57         doScrollCheck();58     }59 }