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            var bodyHeight          =document.body.clientHeight;              //ÍøÒ³¿É¼ûÇøÓò¸ß
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            var bodyHeightWithBorder=document.body.offsetHeight;     //ÍøÒ³¿É¼ûÇøÓò¸ß(°üÀ¨±ßÏߵĿí)
            var bodyWidthWithScroll =document.body.scrollWidth;         //ÍøÒ³ÕýÎÄÈ«ÎÄ¿í
            var bodyHeightWithScroll=document.body.scrollHeight;        //ÍøÒ³ÕýÎÄÈ«Îĸߠ
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var strM = "javascript is a good script language";
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