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The previous code uses this method to bind the event handler function for the window.onload event. It binds an anonymous function, and of course it can also bind a named function. The code example is as follows:In TCP protocol, messages arriving at the destination will enter the buffer of the TCP stack and will not be forwarded to the receiving system until the buffer is full. This is to minimize the number of times the system empties the buffer. However, the sender can force the receiving system to clear the contents of the buffer by sending a TCP message with a PSH flag of 1. The TCP PUSH + ACK attack, like the TCP SYN attack, aims to deplete the resources of the victim system. When an attacker sends TCP messages with PSH and ACK flags set to 1 to the Target host, these messages will cause the Target system to clear all TCP buffers (whether the buffers are full or not) and respond with an acknowledgement message. If this process is performed by a large number of controlled hosts, the system will not be able to process normal data, resulting in denial of service.United States: 50,600The force of the collision between the two bodies is nothing more than the flower that this force urges to bloom.　　韩秀妍饰演M文库科长尹熙秀，她具备引领潮 流的敏锐触觉和出众的业务能力，也能发表自己的意见。但和时尚的外表不同，性格很稳重，因此在公司里深受男同事的欢迎。她作为M文库行事历开发项目的负责人和Handas Office营业企划部职员们共事， 因此和过去结缘的姜白浩重逢。Code as above; You can see, There are obvious shortcomings, For example, when I click on an element, I need to create a div. I click on the second element to create a div again, We frequently click on such and such elements, and they will frequently create div elements. Although we can remove pop-up codes when we click Close, it is not good for us to frequently create and delete them, especially for performance, and frequent operations on DOM will cause redrawing, etc., thus affecting performance. Therefore, this is a very bad habit. We can now use the monomer mode to realize the pop-up effect. We can instantiate it only once. The following code:四猫一齐答应，立即就冲了出去。