18.4.1 driveexists方法.html

来自「即学即用JavaScript核心对象参考手册原版光盘」· HTML 代码 · 共 25 行

 <script>  
   var oFso=new ActiveXObject("scripting.FileSystemObject");
   var counter=0,totalSpace=0;
   for(var i=65;i<=90;i++)
   {
      var char=String.fromCharCode(i);
	  if(oFso.DriveExists(char))
	     {
		    document.write("<li>"+char.toUpperCase()+"盘存在,");
			var oDrv=oFso.GetDrive(char);
			if(oDrv.IsReady)
			   {
			      var space=Math.round(oDrv.TotalSize/Math.pow(1024,2));
				  totalSpace+=space;
				  document.write("空间："+space+"M")
				}
		    else
			    document.write("未就绪");
			counter++;
		 }
   }
   document.write("<br>共发现了"+counter+"个磁盘，总空间："+totalSpace+"M");
 </script>