层遮罩
.LoginWinDIV{ 
}
width: 119px; height: 71px; z-index:99;background-color: #F0F4FB; border:1px solid #ffffff; border-bottom:4px solid #92a9c4; padding:1px; 
} .LoginWinDIV1 { position:absolute; left:0px; top:0px; z-index:98; background-color: #000000; filter:progid:DXImageTransform.Microsoft.Alpha(opacity=90); } 
.ShieldWinDIV { position:absolute; left:0px; top:0px; background-color: #0D1426; filter:progid:DXImageTransform.Microsoft.Alpha(opacity=70); z-index:98; } <html><head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <link href="stylesheet.css" rel="stylesheet" type="text/css" /> <script type="text/javascript" language="javascript"> <!-- var url; url=location; //登录窗口 function Login()
{ 
if(LoginWinDIV) { LoginWinDIV.style.display=''; NGShieldDIV(); 
} } //屏蔽操作 function NGShieldDIV() { if(document.body.clientHeight>screen.height-120) { Layer1height=document.body.clientHeight; Layer1width=document.body.offsetWidth; } else { Layer1height=screen.height; Layer1width=document.body.offsetWidth; } varstr="<div id='LoginWinDIV2' oncontextmenu='event.returnValue=false' class='ShieldWinDIV' style='width:"+Layer1width+";height:"+Layer1height+";'></div>"; ShieldWinDIV.innerHTML=varstr; } //放开操作 function OpenDIV() { ShieldWinDIV.innerHTML=""; } //--> </script> <script type="text/javascript" language="javascript"> var DIVWidth=document.body.clientWidth; var DIVHeigth=document.body.clientHeight; LoginWinDIV.style.left=DIVWidth/2-240; LoginWinDIV.style.top=200; RegeditWinDIV.style.left=DIVWidth/2-240; RegeditWinDIV.style.top=200; InfoWinDIV.style.left=DIVWidth/2-240; InfoWinDIV.style.top=200; </script></head><body> <span id='ShieldWinDIV'></span> <div id="LoginWinDIV" class="LoginWinDIV" style="position: absolute; left: 204px; top: 91px; z-index: 99; padding: 1px; display: none;"> <input name="btnSubmit" type="button" class="buttonStyle" value=" 取消 " onclick="OpenDIV();LoginWinDIV.style.display='none';" /></div> <center> <input name="btnSubmit2" type="button" class="buttonStyle" value="上传文件" onclick=" Login()" /> </center></body></html>