JS实现选择文件保存路径

<input id="Button1" type="button" value="选择路径" onclick="javascript:browseFolder()"/>
<input id="show" type="text" />

<script>
function browseFolder() {    
    try {    
        var Message = "请选择路径";  //选择框提示信息    
        var Shell = new ActiveXObject("Shell.Application");    
        var Folder = Shell.BrowseForFolder(0, Message, 64, 17);//起始目录为：我的电脑     
        //var Folder = Shell.BrowseForFolder(0,Message,0); //起始目录为：桌面
        if (Folder != null) 
        {    
            Folder = Folder.items();  // 返回 FolderItems 对象    
            Folder = Folder.item();  // 返回 Folderitem 对象    
            Folder = Folder.Path;   // 返回路径    
            if (Folder.charAt(Folder.length - 1) != "\") 
            {    
                Folder = Folder + "\";    
            }    
            //document.getElementById(path).value = Folder;   
            document.getElementById("show").value=Folder;
            //alert(Folder);    
            return Folder;    
        }    
      }    
      catch (e) 
     {    
        alert(e.message);    
     }    
}  

</script>

但是此方法有限制，我运行时只能适用于IE浏览器，其他的浏览器就不行了。。。