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created along the prototype object.create () of the prototype chain, obj, also does not have an X defined. The prototype of the prototype of obj, which is the A,a function, has x, but a does not define x itself, so it is normal to report undefined. Indeed, the foundation is not solid enough to write this redundant verification.Then take a look at the prototype chain inheritance.a.x= "GG"; Console.log (//obj.x A has defined X:ggAs expected, obj has no x, it needs to find its parent class (Obj_fa

blind eyes. However, with the improvement of the national quality, the attention to environmental protection and education has been improving, the public education game has a potential user base, players and the media are looking forward to the next public interest theme games appear. For example, the "pollution map" app that was mentioned in the documentary immediately rushed to the top of the free iOS list, and the public interest issues have attracted attention. Of course, the premise of the

Win7 The system runs the activation tool and prompts for a denial of access what's going on? 1, Shutdown and exit antivirus software, security guards and firewalls; 2, enable Administrator account: Administrator; Enable method: Click the Start button, find "Computer" in the pop-up menu, right click on "Computer", select "Manage", click "Local User and group", select the user, and see all users of the machine in the right window; Administrator "Click

Win7 Open Disk Management "Unable to connect to Virtual Disk Service" What's going on? The specific methods are as follows: 1, right click on the computer Select Properties-management-Services found Virtual Disk Service double-click to open it disabled, select Manual with a drop-down list; 2, if the above is still not working, you can generally be sure you are installed UltraISO software, software to uninstall can be opened. When you insta

WIN8 system QQ suspended animation is what is going on? 1, upgrade the driver or refresh firmware: Due to the hardware generated WIN8 suspended animation problem accounted for the majority, so if you installed Windows 8, frequently encountered suspended animation. First, consider the hardware driver or firmware issue. Install the software such as Driver Wizard, update the drive of the system to avoid this situation to the greatest extent.

WIN8 system Computer often crashes is what is going on? First, eliminate the system of suspended animation problem First look at whether the power supply is plugged in, the computer parts of the data cable connection is correct, if not the system is indeed a crash failure. Second, check whether virus infection caused by the crash Verify the Win8 pure version of the system before the death of the virus, if the antivirus destroyed the syst

Win7 System can't play MKV format movie What 's going on 1, some players can not play this type of file. At this time we can directly download Gillette audio or video or thunder to see, you can play directly; 2, if we need to clip the video, you can choose to use the sound will shadow or love clips, the following directly say love clips how to operate. By adding a media file, set the start time and end time, you can clip th

The computer memory is always not prompt enough what's going on The computer memory always prompts insufficient solution analysis a The quickest way to do this is to release the memory that is used, to turn off other programs or browsers that are in use, and to use the 360 accelerator ball to clean up the system's memory and garbage, and to turn off unused services. Improve the virtual memory of the computer, improve the virtual memory

XP system computer monitor has ripple what's going on 1, electromagnetic interference, the most common may be the notebook connected to the power will shake, and do not connect the power is fine, this is generally in the industrial electricity more easily appear, you only need to replace a power adapter or the power plug to cut off the ground; 2, electricity impact, this situation is that you pick up the computer socket is the electricit

XP system prompts "didn't find Iertutil.dll" What's going on? First, symptoms 1, uninstall IE, or do not know uninstall a file, restart can only see the desktop background, the desktop on the other things are missing. 2, open computer IE and explore can not start, and try to run Explore.exe, always play window "did not find Iertutil.dll, so this application failed to start, reinstall may fix this problem." Ii. Solutions Method One: 1

Win7 the empty folder inside the system hard drive cannot be deleted what's going on? The workaround is as follows: Method one, conventional solution 1, note the elimination or restart the computer, and then try to delete; 2, into the "Safe mode of deletion"; 3. Use del, deltree and RD commands to delete them at the Pure DOS command line; 4, if there are more subdirectories or files in the folder can not be deleted, you can first delete the subd

achieve the page effect, create the atmosphere of the elements. By searching on the web, we find and process the material as an available element that is consistent with the overall tonal style of the page. 01 paper, by processing, forming the form of a map, and holding it in hand, facing the whole scene, so that the whole formation of dad and Wale to play, holding a map to see where and where to go and where we are going. 02 hands, wit

Thunderbolt 7.9 Download has been prompted to connect resources what's going on Thunderbolt 7.9 Download Prompts the connection resource is not responding! This is a big question, look at how the great Gods resolved: 1, download a Thunderbolt 7.9 of the installation package test to see if there is speed, to determine whether the individual task download speed, or all the tasks. 2, the individual task download speed is the source of resources orig

XP system under QQ can not go up what is going on Solution: 1, check whether the network interruption, to see if our computer networking, whether with the network interruption, casually open a Web page, or log on to other networking software to try to log in, you can also check our desktop at the bottom of the local link state whether there is a problem (if it is a network problem, Then please unplug the cable interface and plug it, you can also use

Win7 System Desktop no icon only status bar what's going on 1, small part of the computer desktop in addition to the taskbar, do not show any icon, the following we will elaborate on how to let those icons show; 2, click the right mouse button on the desktop, do not right-click in the taskbar, and then pop-up the following menu; 3, mouse click or move the mouse to the "View" menu, then will open the view on the Right submenu

win7 System desktop configuration 8G memory display available memory only 3.4G What's going on? The specific steps are as follows: 1, start-run (Input msconfig)-click: OK or enter; 2, in the pop-up "System Configuration" window, we click: Guide; 3, then we click: Advanced Options (V); 4, in the Pop-up Boot Advanced Options window, we see: Maximum memory is 256MB, and we configure the mem

Open the U disk prompts to format what is going on? Prompt for formatting when open, because the file system is not recognized by the operating system. Do not attempt to format and then restore, formatting will only destroy the data again, so that the data recovery is incomplete. 1, unformatted may be the partition is exFAT file system, the operating system did not update the new file system does not support the solution, with 360 update system patc

The motherboard is powered on but not bootable what's going on? 1, Power switch failure When the power switch button because the aging can not be reset or chassis front panel because of the deformation caused by the power switch button can not be reset in time, using the switch is always in the state, then the power switch will appear after the main engine to start, but after 4 seconds automatically shutdown. If the relevant line of the

XP system boot to press F11 to enter the system what's going on? Following the small series to see the XP system on the boot need to press F11 to enter the system and the reasons for the solution! "Problem description": Every time you start your computer, you have to press F11 to enter. Computer knowledge "Cause analysis": The Restore Wizard is written to the hard drive boot area; F11 is usually a shortcut key that goes into System Rest

Win7 system speed is slow what's going on? Steps: 1. Create a new text document in any location; 2. Open the text document and copy the following code in: Windows Registry Editor Version 5.00 [Hkey_local_machinesystemcurrentcontrolsetservicestcpipparameters] "SackOpts" =dword:00000001 "TcpWindowSize" =dword:0003e640 "Tcp1323Opts" =dword:00000001 "DefaultTTL" =dword:00000040 "EnablePMTUBHDetect" =dword:00000000 Www.xitonghe.com