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So far, a common "block" with attributes named "elevation" has been created. The following steps edit this ordinary "block" into a dynamic "block."Although the above pop-up code has completed the effect of creating pop-up windows using single mode, the code is not universal. For example, the above is the code for completing pop-up windows. What if we need an iframe on the page in the future? Do we need to rewrite a set of code to create iframe? For example, create an iframe as follows:佃航平（阿部宽饰）曾经是宇宙科学研究机构的研究员，因工作失败辞职回到家乡，经营父亲留下的工厂佃制作所。航平的工厂遇到经营危机，而此时工厂的会计部长殿村直弘（立川谈春饰）的父亲突然病倒。殿村老家是有三百年历史的农家，他每周末要回去帮忙，照顾父亲。在去看望他时航平突然产生了新的想法，从此后，佃制作所迎来了新的换型期哈哈，现在我想在燕京买房都可以了。韩平、叶红、文安三位刚刚步入社会生活的都市女性的事业、爱情、身世之谜诸方面的矛盾纠葛为主线，心充满机遇而又潜伏风险的现代都市生活为背景，反映她们的奋斗与失落、欢乐与感情，借以勾勒当代女性全新的生活理念与追求，在他们不同命运的轨迹中，伴随着各色各样的人物的渐次登场，展示了一幅幅色彩斑斓的当代都市生活的图景。同时，也表现了这种生活的丰富以及当代女性复杂的精神世界。SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed."Pond" water storage pit, generally not too big, not too deep. In the Southern Song Dynasty, Xie Lingyun's poem "Climbing the Pool and Going Upstairs" said: "Spring grass grows in the pond, and willows in the garden become songbirds." Tang Yang's poem "The Leisure Walk in the Spring Dynasty" reads: "The pond is littered with fragrant grass, and the orchid Zhi attacks the secluded Jin." The second word in Song Liuyong's "Fighting with Flowers" is: "The pond is dipped in smoke and weeds, and the curtain is hung with wind and flocs." Ba Jin's "Spring" 12: "The tea shed referred to by Juemin is built on a slightly inclined grass, with three sides empty and the other side leaning against the pond." 2. Common name of bath. Han