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com/extras Code 3/9 Drawer In Java Using Barcode drawer for Java Control to generate, create ANSI/AIM Code 39 image in Java applications. 2 Paste the code into the <head> section of your page 3 Add the <form> and <input> tags (including the name attribute on each) on your page where you want your clock to appear The very first thing that JavaScript does when the Web page loads is set the window s onload event handler to trigger the theClock function This is no big deal unless you want to run another script when the page loads However, this script is written in such a way that it never comes back to run anything else, since the clock is constantly updating itself Barcode Generator In Java Using Barcode generator for Java Control to generate, create barcode image in Java applications. JavaScript and DOM
Decode Barcode In Java Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications. When you add both JavaScript and some DOM manipulation to your page, you can update the text of the page itself, as shown in Listing 15-5 Figure 15-7 shows a clock that updates every second, but it looks visually just like the rest of the text on the line Draw Code 39 Extended In Visual C#.NET Using Barcode encoder for VS .NET Control to generate, create USS Code 39 image in VS .NET applications. 15: Fun with Client-Side Scripts
Code 39 Extended Generation In Visual Studio .NET Using Barcode creation for Visual Studio .NET Control to generate, create ANSI/AIM Code 39 image in .NET framework applications. Figure 15-7: This page displays the current time, updated every second, as simple text
Painting Code 39 Full ASCII In Visual Basic .NET Using Barcode creator for .NET framework Control to generate, create Code39 image in Visual Studio .NET applications. Listing 15-5: Drawing ANSI/AIM Code 39 In Java Using Barcode encoder for Java Control to generate, create USS Code 39 image in Java applications. A Slightly More Complex JavaScript and DOM Clock
DataMatrix Creation In Java Using Barcode maker for Java Control to generate, create ECC200 image in Java applications. <!DOCTYPE html PUBLIC -//W3C//DTD XHTML 10 Transitional//EN http://wwww3org/TR/xhtml1/DTD/xhtml1-transitionaldtd > <html xmlns= http://wwww3org/1999/xhtml > <head> <title>DOM-based Clock</title> <meta http-equiv= Content-Type content= text/html; charset=ISO-8859-1 /> <script type= text/javascript language= javascript15 > windowonload = theClock function theClock() { now = new Date; theTime = ((nowgetHours() > 0 && nowgetHours() < 13)) nowgetHours() : (nowgetHours() == 0) 12 : nowgetHours()-12; theTime += (nowgetMinutes() > 9) : + nowgetMinutes() : :0 + nowgetMinutes(); theTime += (nowgetSeconds() > 9) : + nowgetSeconds() : :0 + nowgetSeconds(); theTime += (nowgetHours() < 12) am : pm ; clockSpan = documentgetElementById( myClock ); clockSpanreplaceChild(documentcreateTextNode(theTime), clockSpanfirstChild); setTimeout( theClock() ,1000); (continued) EAN / UCC - 14 Creation In Java Using Barcode drawer for Java Control to generate, create UCC-128 image in Java applications. Part IV: Integrating Scripts with HTML
Bar Code Creation In Java Using Barcode encoder for Java Control to generate, create barcode image in Java applications. Listing 15-5 (continued) Code128 Printer In Java Using Barcode creator for Java Control to generate, create Code 128B image in Java applications. } </script> </head> <body> The current time is <span id= myClock > </span> </body> </html>
Postnet Generator In Java Using Barcode printer for Java Control to generate, create Delivery Point Barcode (DPBC) image in Java applications. The script in Listing 15-5 is virtually identical to Listing 15-4, except for a couple of different lines of JavaScript Using the DOM, the script can grab that text and replace it with new text every second The good news: You can style that text with CSS and have it appear just like everything else on the page The visual look is far superior to putting the dynamic text inside an <input> tag The bad news: Older browsers don t support the <span> tag, so if your visitors use legacy versions of Netscape or Microsoft browsers, consider using the HTML and JavaScript version instead Other examples in this book show the initial <script> tag with the language attribute set to javascript This particular script specifies javascript15, which tells the browser to ignore everything that s going on if you aren t using a modern browser If you come into this page with an older browser, you won t get an error, but you won t get the dynamic effects, either To add the DOM-enabled scripted clock to your page, follow these steps: 1 Add everything between the beginning and ending <script> tags to the <head> section of your page 2 Add a <span> tag with an id attribute of myClock anywhere on your page The clock appears! Are you getting errors when you try to add the DOM-powered clock to your page Some browsers have a problem with either nothing or a space in the <span> tag Solution: As with the example shown in Listing 15-5, put something (anything) inside the <span> tag for when it s initially loaded In this case, there s a question mark, but it won t ever be visible to the Web page visitor EAN13 Reader In Visual Studio .NET Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET applications. Displaying Pop-up Windows
Read ANSI/AIM Code 128 In Visual Studio .NET Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET framework applications. Pop-up windows are both one of the most useful and one of the most abused tools on the Web Having a way to provide some extra information to site Create Bar Code In VS .NET Using Barcode creation for .NET Control to generate, create bar code image in .NET framework applications. 15: Fun with Client-Side Scripts
Data Matrix ECC200 Drawer In VB.NET Using Barcode creation for .NET framework Control to generate, create Data Matrix ECC200 image in VS .NET applications. visitors without making them leave a page is very useful Unfortunately, so many unethical people have given pop-ups (particular advertising pop-ups) a bad name that many Web surfers install pop-up blockers Consequently, if you add pop-up windows to your site, make sure that they aren t the only way that your visitors have of getting information Figure 15-8 shows a simple pop-up window containing the clock from Listing 15-5 This little window is a nice, floating, constantly updated clock that can stay up even after you ve left the calling page Listing 15-6 shows how to create this pop-up window, which is a new browser window that doesn t have an address bar, menu bar, scroll bars, status bar, or toolbars, as shown in Figure 15-8 Bar Code Reader In Visual Studio .NET Using Barcode recognizer for .NET Control to read, scan read, scan image in Visual Studio .NET applications. USS-128 Generation In C# Using Barcode maker for Visual Studio .NET Control to generate, create EAN / UCC - 13 image in Visual Studio .NET applications. UCC-128 Generation In VS .NET Using Barcode generation for VS .NET Control to generate, create GS1 128 image in .NET framework applications. |
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