JS设计模式:桥接模式
``` function changeColor(dom, color, bg) { dom.style.color = color; dom.style.background = bg; } var spans = document.getElementsByTagName('span'); spans[0].onmouseover = function() { changeColor(this, 'red', '#ddd'); } spans[0].onmouseout = function() { changeColor(this, '#333', '#f5f5f5'); } sp...