【導(dǎo)讀】隨著人們生活水平的不斷提高，養(yǎng)犬的家庭越來越多，犬病也不斷發(fā)生。這一矛盾”因此，開發(fā)寵物犬疾病防治專家系統(tǒng)應(yīng)該是解決這一矛盾的有效途徑。的的基礎(chǔ)上提出的，具有很重要的現(xiàn)實意義。針對動物疾病診斷的特點，本研究設(shè)計。有實用性強(qiáng)、操作和維護(hù)簡單的優(yōu)點。網(wǎng)頁制作工具，并以ACCESS作為后臺數(shù)據(jù)庫開發(fā)。界面的友好程度直接決定著用戶是否樂意使用該軟件。

　　

【正文】 ased photo gallery to a plete catalogue and shopping cart system for your next eCommerce project。 One unique feature of ASP is that it lets you choose your favourite scripting language, be it JavaScript or VBScript。 however, VBScript is by far the most popular choice. In this article, I39。ll bring you up to speed on the basic syntax of the VBScript language, including variables, operators, and control structures. ServerSide Scripting To understand where ASP fits into the big picture of Web development, you need to understand the concept of a serverside scripting language. If you39。ve programmed Web pages in Perl, PHP, JSP, or Cold Fusion before, you can safely skip this section – all of those are serverside scripting languages, and ASP works in much the same way. If you39。re ing to ASP armed only with knowledge of HTML (and perhaps with some CSS and/or JavaScript experience) then you39。ll find that serverside scripting is quite a bit different. Let me begin by giving you a quick review of how standard, nonASP Web pages work. As shown in Figure 1, the Web browser on the client puter (the puter belonging to the user) makes a request for a page, say (1). Assuming the requested file exists on the Web host puter where the Web Server software can find it, that software replies to the request by sending the file back to the browser (2). Any additional files (images, for example) required to display the page are requested and received in the same way. The protocol used for this exchange, and indeed for all munication between Web browsers and Web servers is called Hypertext Transfer Protocol (HTTP). If you39。ve ever used any JavaScript in your pages, you know that the requested Web page () can contain, in addition to plain HTML code, small programs written in 1 Craig A. VanLengen, Flagstaff, AZ John D. Introduction Of ASP[J].Journal of Computing Sciences in Colleges ,20(1)342356. 33 JavaScript. These programs, or scripts, are read and executed by the Web browser while the page is displayed in the browser. So the Web browser must understand not only how to read HTML and display text. and images, but it must also be able to run JavaScript programs appearing inside Web pages. This arrangement, where the Web browser runs the script after receiving it from the Web server, is called clientside scripting. The name makes sense – all of the script runs on the clientside – the righthand side of Figure 1. The Web server is pletely oblivious to whether the file it is sending contains a script or not。 it’s all up to the browser (the client) to handle execution of the script. ASP fits into a different category of technologies, called serverside scripting, where it is no longer the browser running on the client that is responsible for running the script。 instead, it is the Web server that runs the script. This process is illustrated in Figure 2. As before, the Web browser requests a file (1). In this case, however, the filename ends with .asp (, for example), branding it as a file containing an ASP script that needs to be processed by the server. The server recognizes this, and instead of directly sending the requested file back to the browser, it sends the file to the ASP scripting engine (2). The engine is a ponent of the Web server software that can interpret ASP scripts and output the results as HTML. The trick here is that any given script can output different HTML each time it is run, so what es out of the ASP engine can be different for each client (browser) request. That dynamically generated page is then sent to the browser in response to its request (3), in exactly the same way as the static page was sent in the previous example. Just as when the page contained clientside JavaScript and the server was pletely unaware of this fact, when the page contains serverside ASP script, the browser does not know this at all. The ASP code contained in the page is interpreted and converted to plain HTML by the ASP engine before the browser gets to see it。 so as far as the browser is concerned an ASP page looks just like any normal Web page. All the work is done on the serverside。 thus the name, serverside scripting. 34 附錄 2：外文文獻(xiàn)中文譯文 ASP 簡介 ASP 是構(gòu)建動態(tài)網(wǎng)頁應(yīng)用的被實踐證明了的技術(shù)，為 你需要創(chuàng)建任何的東西從一個基于圖片庫個人網(wǎng)頁到一個完整的目錄，為你的下一個商業(yè)項目提供全面的系統(tǒng)提供了強(qiáng)大的功能和靈活性。 ASP 唯一的特性即讓你選擇你最喜歡的腳本語言，像JavaScript 或者 VBScript，然而 VBScript 是至今為止最流行的腳本語言。在本文中，我將帶你學(xué)習(xí) VBScript 的基本 syntax，包括變量，操作數(shù)和控制結(jié)構(gòu)。 服務(wù)器端的腳本 為了理解 ASP 適合 Web 開發(fā)的大圖片，你需要理解服務(wù)器端的腳本語言的概念。如果你用 Perl, PHP, JSP 或者 Cold Fusion 編寫 We b 頁面前，你能夠安全略過這部分— 所有這些是服務(wù)器端的腳本語言， ASP 工作在許多相同的方式。如果你只是用HTML 知識來輔助 ASP(也許有過一些 CSS 或者 Java 腳本的經(jīng)歷 ),那么你將發(fā)現(xiàn)服務(wù)器端的腳本是有點不同之處的。 讓我開始給你一個標(biāo)準(zhǔn)的快速回顧，非 ASP Web 網(wǎng)頁工作。圖 1 中顯示客戶端的計算機(jī)（計算機(jī)屬于用戶） Web 瀏覽器對頁面做請求即 html (1)文件。假定在 Web主機(jī)上存在被請求的文件， Web 服務(wù)器軟件能發(fā)現(xiàn)它，軟件能通過發(fā)回文件給瀏覽器來回應(yīng)請求。任何附加文件（如圖象文件）要求顯示頁面是用同 樣的方式請求和接收。協(xié)議用做交易，的確 Web 瀏覽器和 Web 服務(wù)器通信是叫做 HTTP。 如果你曾經(jīng)在你的網(wǎng)頁上用過 Java 腳本，你知道請求 Web 網(wǎng)頁（ html 文件）能包含除了普通 HTML 代碼，用 Java 腳本寫的小程序。這些程序或者腳本通過 Web 瀏覽器是可讀可執(zhí)行的當(dāng)頁面顯示在瀏覽器上時。所以 Web 瀏覽器必須理解怎么讀HTML 和顯示文本和圖象，但是它必須能運行顯示在 Web 頁面的 Java 腳本程序。瀏覽器收到 Web 服務(wù)器這個安排后運行腳本，這個安排叫客戶端腳本。在圖 1 右手邊所有名字有意義的腳本在客護(hù)端運行。 Web 服 務(wù)器文件發(fā)送是否包含腳本是完全健忘的，這是瀏覽器（客戶端）處理執(zhí)行腳本。 ASP 適合不同的技術(shù)種類，叫客戶端腳本，它不在瀏覽器運行客戶端而是在 Web服務(wù)器上負(fù)責(zé)運行腳本。這個過程在圖 2 中描繪。 像前面一樣， Web 瀏覽器請求文件（ 1）然而在這樣的情況下，文件名末尾用 asp（如文件 asp），標(biāo)志著這個文件包含 ASP 腳本需要服務(wù)器來處理。服務(wù)器認(rèn)識這個，代替直接送請求文件給瀏覽器，它送文件給 ASP 腳本引擎（ 2）引擎是 Web 服務(wù)器的重要軟件，它能夠解釋 ASP 腳 35 本和作為 HTML 輸出結(jié)果。這里的訣竅是任何已給的腳本每次 運行能輸出不同的HTML，所以 ASP 引擎的出現(xiàn)能對每一個客戶（瀏覽器）請求是不同的。那動態(tài)生成的網(wǎng)頁被送到瀏覽器以響應(yīng)它的請求，這跟以前的靜態(tài)網(wǎng)頁有相同的方式。 正象頁面包含客戶端的 Java 腳本和服務(wù)器是完全沒有意識到這個事實，當(dāng)頁面包含服務(wù)器端的 ASP 腳本，瀏覽器是根本不知道的。 ASP 代碼包含在頁面被解釋和傳送到 ASP 頁面看起來像其它任何普通的 Web 頁面。所有的工作在服務(wù)器端，所以名字就是服務(wù)器端腳本。