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JavaScript实现 panel的显示隐藏

<script language="javascript">
    function closeOpen(Panel) {
        var test = document.getElementById('Panel');
        if (test.style.display == "none") {
            test.style.display = "";
        }
        else {
            test.style.display = "none";
        }
    }
</script>
  <input id="Button1" type="button" value="显示隐藏panel" onclick="closeOpen('Panel1')"  style="background-image: url('images/title_bg_hide.gif');" />


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