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$(document).ready(function() {
var Sys = {};
var ua = navigator.userAgent.toLowerCase();
if (window.ActiveXObject)
Sys.ie = ua.match(/msie ([\d.]+)/)[1]
else if (document.getBoxObjectFor)
Sys.firefox = ua.match(/firefox\/([\d.]+)/)[1]
else if (window.MessageEvent && !document.getBoxObjectFor)
Sys.chrome = ua.match(/chrome\/([\d.]+)/)[1]
else if (window.opera)
Sys.opera = ua.match(/opera.([\d.]+)/)[1]
else if (window.openDatabase)
Sys.safari = ua.match(/version\/([\d.]+)/)[1];
//ÒÔϽøÐвâÊÔ
if (Sys.ie) $("#llq").html("IE:" + Sys.ie);
if (Sys.firefox) $("#llq").html("Firefox: " + Sys.firefox);
if (Sys.chrome) $("#llq").html('Chrome: ' + Sys.chrome);
if (Sys.opera) $("#llq").html('Opera: ' + Sys.opera);
if (Sys.safari) $("#llq").html('Safari: ' + Sys.safari);
})
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<head>
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Node.PROCESSING_INSTRUCTION_NODE
Node.COMMENT_NODE
Node.DOCUMENT_NODE
Node.DOCUMENT_TYPE_NODE
Node.DOCUMENT_FRAGMENT_NODE
Node.NOTATION_NODE
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<iframe width='100%' height='100%' name='boot' id='boot' src='' frameborder='0' scrolling='no'></iframe>
<SCRIPT LANGUAGE="JavaScript">
<!--
var iframe = window.frames['boot'];
iframe.document.open();
iframe.document.write('<!DOCTY ......