


JS printing function code can realize print preview, print settings, etc._javascript skills
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>中国绿色厨房计划</title> <style> @media print{ .noprint{ display:none } } </style> <script language=javascript> function printsetup(){ // 打印页面设置 wb.execwb(8,1); } function printpreview(){ // 打印页面预览 wb.execwb(7,1); } function printit(){ if (confirm('确定打印吗?')){ wb.ExecWB(6,1) //wb.execwb(1,1)//打开 //wb.ExecWB(2,1);//关闭现在所有的IE窗口,并打开一个新窗口 //wb.ExecWB(4,1)//;保存网页 //wb.ExecWB(6,1)//打印 //wb.ExecWB(7,1)//打印预览 //wb.ExecWB(8,1)//打印页面设置 //wb.ExecWB(10,1)//查看页面属性 //wb.ExecWB(15,1)//好像是撤销,有待确认 //wb.ExecWB(17,1)//全选 //wb.ExecWB(22,1)//刷新 //wb.ExecWB(45,1)//关闭窗体无提示 } } </script> </head> <body> <div class="noprint" style="width:640px;height:20px;margin:100px auto 0 auto;font-size:12px;text-align:right;"> <input value="打印" type="button" onclick="javascript:window.print()" /> <OBJECT classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2" height="0" id="wb" name="wb" width="0"> </OBJECT> <input type=button name=button_print style="display:none;" value="打印本单据" onclick="javascript:printit()"> <input type=button name=button_setup value="打印页面设置" onclick="javascript:printsetup();"> <input type=button name=button_show value="打印预览" onclick="javascript:printpreview();"> <input type=button name=button_fh value="关闭" onclick="javascript:window.close();"> </div> <div style="width:640px;height:624px;margin:20px auto;"> 体察民情 ——到最偏远最贫穷的地方雪中送炭 下党乡,寿宁县最边远的山乡之一,1988年才建乡,曾经是"五无乡镇"(无公路、无自来水、无电灯照明、无财政收入、无政府办公场所)。 1989年7月19日,时任宁德地委书记习近平带领地直相关部门负责人头戴草帽,肩搭毛巾,顶着炎炎烈日,在崎岖山路上跋涉2个多小时,深入到乡政府所在地下党村。 乡党委、政府临时在鸾峰桥边的王氏祠堂里办公,条件极其简陋,大家就围坐在小板凳上开会。吃饭、午休就安排在鸾峰桥上,午饭后,稍作休息,习近平又进村入户、访贫问苦。 回程仍要步行10多公里,路险坡陡,且荆棘杂草丛生,习近平一行拿着柴刀将挡在路面的荆棘、苇秆劈除。直到晚上8点左右,他们才回到寿宁城关。 参加调研的时任寿宁县委常委、常务副县长连德仁在日记中写道:"这一天,乘车5个小时,步行4个半小时,开会座谈访贫2个小时,一路风尘,大汗淋漓,辛苦程度不言而喻……回到县城招待所后,许多干部才发现脚底、脚趾都磨出了血泡。" 习近平同志后来用"异常艰苦、异常难忘"来形容此次下党之行。1989年7月26日、1996年8月7日,他又两次来到下党,协调解决当地的建设发展难题。 无论是在厦门、宁德,还是后来主政省会福州、担任省领导,百姓的安危冷暖,习近平始终记挂在心,访贫问苦成了他工作中不可或缺的一部分。"三进下党乡",只是习近平心怀百姓的一个缩影。 担任厦门市副市长期间,习近平曾分管农业农村工作。他提出,分管农业,首先就是要上高山,下海岛。 厦门市人大常委会原副主任、时任同安县长郭安民记得,有一次他陪同习近平下乡调研,村支书请他们喝茶。由于长期泡工夫茶,茶杯上面有茶碱,看起来有点脏,习近平端起来就喝。"过去领导下乡一般自带保温杯,一坐下来,秘书就把杯子拿来。习近平同志这一喝,和基层群众的距离一下子近了。"郭安民感叹。 习近平强调:"下基层要少搞'锦上添花',多搞'雪中送炭',不要'一窝蜂'似地涌到工作基础好的'热门'地方去凑热闹,而要多跑'冷门',到问题多、困难大、条件苦的地方和群众中去送温暖、办实事。" </div> <div id="dd"></div> </body> </html>

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.


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