detect webwatcher

1. Build an AJAX development framework with the following code2. Write the JavaScript Custom function CheckName (); To detect whether the user name is empty, when the user name is not empty, call the Createrequest () method to send the request to detect whether the user name exists, the code is as follows:function CheckName () { var username = form1.user.value; if (username== "") { window.al

Zi Yue: Learning without thinking is not the case, thinking without learning is dangerous. In the previous article: the Egocache cache framework explained in detail that Egocache can set the cache expiration time by default of 1 days. Look at the Egocache source code, set the default time: [self setDefaultTimeoutInterval:86400]; //86400 = 24 * 60 * 60 刚好是一天时间。Egocache Why do I have to set the cache expiration time? Or what is the benefit of setting the cache expiration time? I think t

Printers is designed to control the printer, but when the printer is not installed, but will be prompted I/O error, so there must be a test to detect the existence of a printer, I tried many methods, but I/O error is always earlier than my judgment, so use the following bad recruit to detect the printer. You can detect the presence of a printer by first adding pr

to generate bugs in Firefox.The first 2 examples are to check a feature separately, if there are many HTML5/CSS3 features, we have to write multiple code to judge, but fortunately, the code does not depend on the order. Modernizr allows you to implement these complex functions with very little code, so let's take a look at some of the important features of Modernizr:Getting Started with ModernizrThe first time I heard Modernizr, I thought it meant modernized, you can add some HTML5/CSS3 new fea

the computer does not detect a removable hard drive solution The computer does not detect a removable hard drive solution one: First, the computer USB interface is not enough voltage, resulting in mobile hard disk can recognize, but can not display the file, it is recommended that the mobile hard disk into the computer host on the back of the USB interface can; Second, the mobile hard drive USB line cont

In your program (or engineering), if the compile phase needs to detect the existence of MySQL client-related library files in the current environment, you can use autoconf to help you do this work, lightweight, elegant, painless. Read this article to learn about the simple GNU autoconf use.1. The objective of this article Objective: Compile-time, according to the Configure parameters (if there is--with-mysql), selectively compile the corresponding my

When running a complex Python program, it can take a long time to execute, and you may want to increase the execution efficiency of your program. But what should we do? First, there is a tool that can detect bottlenecks in your code, for example, to find out which part of the execution time is relatively long. Next, optimize for this section. At the same time, you need to control memory and CPU usage, so you can optimize your code on the other hand.

　U disk mainly has two kinds of packaging structure: 1. Traditional for PCBA package structure. 2. Black Colloid package structure. The interior is mainly composed of a PCB board + main CONTROL + crystal oscillator + capacitive capacitor +usb head +led head +flash (Flash memory), the following figure: PCBA Package Black Colloid Pack (PS: Constant Add letter U disk specified chip packaging structure) Features: simple process and low cost. Features: Not easy to bad, high reliabil

Memory leaks are the biggest headaches for Android developers. Perhaps a small memory leak could be the nest of a ruined sink. How can I detect a memory leak?The Memory Control console (monitor) in Androidstudio provides a memory monitor. It allows us to easily view the performance and memory usage of the application, so that we can find the need to release the object, find the memory leak, and so on. Familiar with the memory interface With the log

Adobe AIR 3.3 includes support for native iOS emulators and provides a quick way to detect and debug iOS applications. The iOS simulator is part of the Apple Xcode IDE, designed to create applications for Mac,iphone and the ipad. For more information on the iOS emulator, see Using the iOS emulator. Before this feature, the only way to test an air application on iOS is to use an actual device and an Apple development certification. Now you don't need t

If you detect PocketPC (PPC) in your program, you are already connected to your PC. The PocketPC SDK provides a set of RAPI functions that we can detect through Cerapiinit or Cerapiinitex. First say cerapiinit, it is defined as: HRESULT cerapiinit (void); This function is simpler to call, and only needs to be checked for its return value. But when the PPC is not connected to the PC, the function waits wi

Label:Preparatory work:In order to detect deadlocks, we need to simulate the deadlock first. This example creates two transactions using two different sessions. Steps:1. Open SQL Server Profiler 2. Select "New trace" to connect to the instance. 3. Then select "Blank" Template: 4. On the Event Selection page, expand the Locks event and select the following event: 1. Deadlock graph 2, Lock:deadlock 3, Lock:deadlock Chain 5. Then open the TSQL event

system call occurs, it jumps to the attacker's ownWrite the function to execute. By observing the system call entry address in the system call table, we can easily detect this attack using gdb.Attacks.The original system call address is specified in the kernel compilation phase and will not be changed. By comparing the original system call address with the system in the current kernel stateThe call address shows whether the system call has been chang

When reading double-byte characters, it mainly involves the selection of encodings:Java code Public Static Boolean isrightfultxt (File f) { //TODO auto-generated method stub String regexp="[^\\x00-\\xff]"; Double-byte characters Pattern P=pattern.compile (regexp); try { FileInputStream fis=New FileInputStream (f); //"GBK" encoding supports double-byte characters InputStreamReader isr=New InputStreamReader (FIS, "GBK"); BufferedReader br=New BufferedReader (ISR); St

The network state of the device for reachability 1.5.typedef enum { notreachable = 0, //no connection Reachableviacar Rierdatanetwork,//Use 3G/GPRS network reachableviawifinetwork //Use WiFi network} networkstatus;//the Device for reachability 2.0.typedef enum { notreachable = 0, //No connection Reachableviawifi, //using 3G/GPRS Network Reachableviawwan //Use WiFi network} networkstatus;For example, to detect the continuation st

ARP attacks are common in LAN, and IP address conflicts may occur in attacked regions. If the gateway has already bound an IP address and a MAC address, it is easier to query, otherwise, it is indeed difficult to find a hacker to attack itself in a long LAN host.Generally, we use a firewall to find the attack culprit. ARP detect can be used to directly find attackers and possible targets. Next, let's take a look at the actual operations. ARP

How to detect custom global variables in JavaScript Note: Misuse of global variables is a bad program design. It is easy to cause dependency and State confusion. In Java and JavaScript, The Global (visible) variables are the hidden killer of Memory leakage. This article provides a reliable way to detect global variables. Setting global variables in JavaScript is not a good habit. The author of the origi

Brief introductionTaint can be used to detect hidden XSS code, SQL injection, Shell injection and other vulnerabilities, and these vulnerabilities to use static analysis tools to troubleshoot, such as the following example:For requests:http://localhost/?name=222Static analysis tools, often powerless, but taint can accurately burst out of this type of problem.Warning: Main::test() [function.echo]: Attempt to echo a string that might be tainted inTaint

You can simply with the below function, you can also change the type element.$ ("Input[type=hidden]"). Bind ("change", function () { alert (this). Val ()); }); in value to hidden elements Don't automatically fire the. Change () event. So, wherever it's that's you'"message">"hidden" id="testchange" value="0" /> Javascriptvar$message = $ ('#message');var$testChange = $ ('#testChange');vari =1; function Updatechange () {$message. html ($message. HTML ()+' to'+ $testChange. val () +'');}

The way to detect whether an object is an array is: Array.isarray ()//True or False (ES5) Tostring.call ([]); [Object Array] Arr.constructor; Array () instanceof Array//True or False Compatibility wording:if (typeof array.isarray=== "undefined") { function(ARG) { return Object.prototype.toString.call (arg) = = = "[Object Array]" };}Example code:var aarr=[1,2,3];console.log (Array.is