禁止IE6的图像工具栏
<meta http-equiv="imagetoolbar" content="no"> 屏蔽右键和编辑
<body oncontextmenu="return false" onselectstart="return false"> <body oncontextmenu='return false' ondragstart='return false' onselectstart ='return false' onselect='document.selection.empty()' oncopy='document.selection.empty()' onbeforecopy='return false' onmouseup='document.selection.empty()' >