js输出浏览器对象和生成日志的方法

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<script type="text/javascript"> function onmousedown(event) {    var content = document.getElementById("ss");    var output = event.type + ": <ul>";    for (property in event) { //循环输出　ｅｖｅｎｔ内的属性／值        output += "<li>" + property + ": " + event[property] + "</li>";    }    console.log(output);    content.innerHTML = output + "</ul>";}</script><p onmousedown="onmousedown" >点击我</p><div id="ss"></div>

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