可以遮住applet的遮罩層

<DIV id="divDiableScreen" style="display:block;Z-INDEX: 100; POSITION: absolute; FILTER: alpha(opacity=15); BACKGROUND-COLOR: #000; WIDTH: 100%; HEIGHT: 100%; TOP: 0px; LEFT: 0px; opacity: 0.15" >
   	<IFRAME style="Z-INDEX: -1; POSITION: absolute; FILTER: progid:DXImageTransform.Microsoft.Alpha(opacity:0); WIDTH: 100%; HEIGHT: 100%; TOP: 0px; LEFT: 0px" src="about:blank" frameBorder=0></IFRAME>
	<DIV style="Z-INDEX: -1; POSITION: absolute; WIDTH: 100%; HEIGHT: 100%; TOP: 0px; LEFT: 0px">&nbsp;</DIV>
</DIV>
           

比起一般的，就是多了個iframe，chrome 和IE測試OK。