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function handleFrameLoad() {
var hDoc = getBodyHeight(document);
var tblmain = document.getElementById('tblMain');
var mFrame = window.mainFrame;
var hFrameDoc = getFrameHeight(mFrame);
var hTable = hDoc-80; //¼õÈ¥¸ÃÒ³Ãæ³ýiframeÍâÆäËû¿Ø¼þËùÕ¼µÄ¸ß¶È.
if(hFrameDoc > hTable) hTable = hFrameDoc;
tblmain.style.height = hTable;
mFrame.height = hTable;
if(window.mainFrame.moduleRight != null){
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}
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function getBodyHeight(doc){
if(doc.all) return doc.body.offsetHeight;
else return doc.body.scrollHeight;
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function getFrameHeight(mFrame){
var h1 = mFrame.document.body.offsetHeight;
var h2 = mFrame.document.body.scrollHeight;
if(mFrame.moduleRight != null){
      var h3 = mFrame.moduleRight.document.body.scrollHeight;
    if(h3 > h2) h2 = h3;
}
return h2;
}
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function initFrameHeight(frame,hFrame){
var tbl = frame.document.getElementById('tblMainFrame');
tbl.style.height = hFrame;
}
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<html>
<body onload="handleFrameLoad();" onResize="handleFrameLoad();">
<iframe src="" id="mainFrame" name="mainFrame" border=0 width=100% height=100% frameborder="0" marginwidth="0" hspace="0" scrolling="no" onload="handleFrameLoad();"/>
</body>
</html
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