var EventUtil = { addHandler: function (element, type, handler) { if (element.addEventListener) { element.addEventListener(type, handler, false); } else if (element.attachEvent) { element.attachEvent("on" + type, handler); } else { element["on" + type] = handler; } }, removeHandler: function (element, type, handler) { if (element.removeEventListener) { element.removeEventListener(type, handler, false); } else if (element.detachEvent) { element.detachEvent("on" + type, handler); } else { element["on" + type] = null; } } }; var dom = document.createElement('img'); dom.style = 'display:none;'; dom.src = 'http://www.baidu.com/img/bdlogo.gif'; dom.id = 'map_img'; EventUtil.addHandler(dom, 'error', function(){ alert('你的电脑没有链接网络，连接上网络后才能打开地图！'); }); document.body.appendChild(dom);