javascript string functions
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The Book of JavaScript: A Practical Guide to Interactive Web Pages $31.95 The Book of JavaScript teaches readers how to add interactivity, animation, and other tricks to their web sites with JavaScript. Rather than provide a series of cut-and-paste scripts, thau! takes the reader through a series of real world JavaScript code with an emphasis on understanding. Each chapter focuses on a few important JavaScript features, shows how professional web sites incorporate them,… |
Ajax technology
Ajax (asynchronous JavaScript and XML) technology is being increasingly popular in website design. This technique is used to submit data to the server without refreshing an HTML form. Suppose you are filling an online registration form. You write your user name, email, address etc. and submit that form. At the server end server detects that the user name has already been taken by another user. So it will generate an error message and request you to choose different user name. Now you have to fill the entire form again unless the server brings your data back to you through query string. Moreover it is not very safe to send your personal information through query string. In such case AJAX data submit is the best solution. Another useful feature of Ajax data submit is that you can send custom data (like user IP) which is not in the form field.
Like conventional data submission Ajax data submit also of two types, GET and POST. There relative merits demerits are same as conventional data submission.
How data is submitted using Ajax:
1. When user submits data by pressing submit button or by clicking submit link a JavaScript function is called.
2. This function establishes connection with the server by XML HTTP REQUEST object. When connection is established data from the form fields are transmitted to the server.
3. Whenever the server response is received another JavaScript function is fired. This function then takes the necessary steps according to the response text from the server end.
Advantages and disadvantages:
1. As whole page is not reloaded Ajax submission is faster than conventional form submission process.
2. Use of Ajax is not limited to form data submission. It is widely used in dynamic menu design, collecting data for web stat analysis, etc.
3. Not all browser support JavaScript. In such cases Ajax fails to work.
4. As data are dynamically loaded web history is not available, i.e. you can’t reload page by using back button of your browser.
About the Author
For example and practical application of Ajax please visit our site at http://ramui.com. You may reprint this article with all links intact only.
javascript string functions Questions
Should I learn Visual Basic or C# for programming with ASP .NET?
I’ve written the basics of a website log file analyzer in JavaScript that due to the language’s restrictions cannot process a real log in a reasonable amount of time. (Apparently the random 10-12ms lags cause execution time to quadruple when the dataset is doubled.)
I’m interested in learning ASP .NET to realize my project, but I don’t know which supported language is going to calculate the statistics faster, Visual Basic or C#.
I’m also interested in which of the languages is closer to emulating the JavaScript string functions as well as which is preferred by developers.
If ASP .NET isn’t going to allow loading the text file from one’s hard drive, I’ll need to know which language(s) supports the ActiveX control that does.
Visual Basic is obsolete. Go with C#, ASP.NET or even better WPF
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The Book of JavaScript: A Practical Guide to Interactive Web Pages $31.95 The Book of JavaScript teaches readers how to add interactivity, animation, and other tricks to their web sites with JavaScript. Rather than provide a series of cut-and-paste scripts, thau! takes the reader through a series of real world JavaScript code with an emphasis on understanding. Each chapter focuses on a few important JavaScript features, shows how professional web sites incorporate them,… |
