huanggm

<!-- 1像素透明 -->
<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7">

<!-- 1像素黑色 -->
<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=">

<a href="http://proger.i-forge.net/%D0%9A%D0%BE%D0%BC%D0%BF%D1%8C%D1%8E%D1%82%D0%B5%D1%80/[20121112]%20The%20smallest%20transparent%20pixel.html">参考网址</a>

wintercn

function getCommonParent(el1,el2){

    var parents1 = [];
    var el = el1;
    while(el) {
        parents1.unshift(el);
        el = el.parentNode;
    }

    var parents2 = [];

gonghao

var THRESHOLD = 150, DELAY = 15;

function initBigArrayAsync(max, cb) {
    var r = [], i = 0;
    
    function init(startTime) {
        while (i < max) {
            if (new Date - startTime < THRESHOLD) {
                r[i++] = i;
            } else {