AjaxAlert信息提示 – 筚路蓝缕

<head>
  <script type="text/javascript">
     function AjaxAlert(txt)
   {
     var eSrc = (document.all) ? window.event.srcElement : arguments[1];
     var shield = document.createElement("DIV");
     shield.id = "shield";
     shield.style.position = "absolute";
     shield.style.left = "0px";
     shield.style.top = "0px";
     shield.style.width = "100%";
     shield.style.height = ((document.documentElement.clientHeight > document.documentElement.scrollHeight) ? document.documentElement.clientHeight : document.documentElement.scrollHeight) + "px";
     shield.style.background = "#333";
     shield.style.textAlign = "center";
     shield.style.zIndex = "10000";
     shield.style.filter = "alpha(opacity=0)";
     shield.style.opacity = 0;

     var alertFram = document.createElement("DIV");
     alertFram.id = "alertFram";
     alertFram.style.position = "absolute";
     alertFram.style.left = "50%";
     alertFram.style.top = "50%";
     alertFram.style.marginLeft = "-225px";
     alertFram.style.marginTop = -75 + document.documentElement.scrollTop + "px";
     alertFram.style.width = "450px";
     alertFram.style.height = "150px";
     alertFram.style.background = "#ccc";
     alertFram.style.textAlign = "center";
     alertFram.style.lineHeight = "25px";
     alertFram.style.zIndex = "10001";
     strHtml = "<ul style=\"list-style:none;margin: 0px;padding: 0px;width:100%\">";
     strHtml += "<li style=\"background: #73A2D6;text-align:left;padding-left:20px;font-size:14px;font-weight:bold;height:25px;line-height:25px;border:1px solid # 9FBFE3;\">[系统提示]</li>";
     strHtml += " <li style=\"background: #fff;text-align:center;font-size: 12px;height: 120px;line-height: 120px;border-left: 1px solid #9FBFE3;border-right:1px solid # 9FBFE3;\">" + txt + "</li> ";
     strHtml += " <li style=\"background: #E6EEF7;text-align: center;font-weight: bold;height: 25px;line-height: 25px; border: 1px solid #9FBFE3;\"><input type= \"button\" value = \"返 回\" id = \"do_OK\" onclick = \"history.back();\" /> </li> ";
     strHtml += "</ul> ";
     alertFram.innerHTML = strHtml;
     document.body.appendChild(alertFram);
     document.body.appendChild(shield);
     this.setOpacity = function(obj, opacity)
     {
       i
       f(opacity >= 1) opacity = opacity / 100;
       try
       {
         obj.style.opacity = opacity;
       }
       catch (e)
       {}
       try
       {
         if (obj.filters.length > 0 && obj.filters("alpha"))
         {
           obj.filters("alpha").opacity = opacity * 100;
         }
         else
         {
           obj.style.filter = "alpha(opacity = \"" + (opacity * 100) + "\")";
         }
       }
       catch (e)
       {}
     }
     var c = 0;
     this.doAlpha = function()
     {
       i
       f(++c > 20)
       {
         clearInterval(ad);
         return 0;
       }
       setOpacity(shield, c);
     }
     var ad = setInterval("doAlpha()", 1);
     this.doOk = function()
     {
       //alertFram.style.display = "none"; 
       //shield.style.display = "none"; 
       document.body.removeChild(alertFram);
       document.body.removeChild(shield);
       eSrc.focus();
       document.body.onselectstart = function()
       {
         return true;
       }
       document.body.oncontextmenu = function()
       {
         return true;
       }
     }
     document.getElementById("do_OK").focus();
     eSrc.blur();
     document.body.onselectstart = function()
     {
       return false;
     }
     document.body.oncontextmenu = function()
     {
       return false;
     }
   }
  </script>
</head>
<body onload="AjaxAlert('不允许上传的文件类型')" leftmargin="0" topmargin="0" marginwidth="0"
marginheight="0">
</body>
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