1.控制横向和纵向滚动条的显隐？
<body style="overflow-y:hidden"> 去掉x轴
<body style="overflow-x:hidden"> 去掉y轴
<body scroll="no">不显
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2.表格变色
<TD style="CURSOR: hand">
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3.禁止复制，鼠标拖动选取
<body ondragstart=window.event.returnValue=false oncontextmenu=window.event.retu