<script> var a =999; var b = document.getElementById("Button1"); var c = document.getElementById("btn2"); //设置窗口返回值 function test() { alert(a); alert(b); alert(c); var d =999; var e = document.getElementById("Button1"); var f = document.getElementById("btn2"); alert("in function:"); alert(d); alert(e); alert(f); } </script>
弹出:
999
null
null
in function:
999
object
object
这是为什么呢?
posted on
2007-12-13 14:43Arlen
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