js获取event对象

<script type="text/javascript">

function fun1(){

    var ev = window.event || arguments.callee.caller.arguments[0],et = ev.srcElement || ev.target;

    alert(ev.tagname);   //获取该标签的对象
}

</script>

请点击框内<input type="text" id="abc" name="abc" onclick="fun1"/>