JS event获取触发事件的对象

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<script>
<script>
function selectWord() {
var oSource = window.event.srcElement ;
alert(oSource);  
alert(oSource.url);
alert(oSource.tagName);
alert(oSource.target);
alert(oSource.getAttribute("url"));
alert(oSource.getAttribute("target"));
}
</script>
<div  onclick = 'selectWord()' url = "aaaaa" target = "_selft" > asdfasdfasdfasdfa</div>