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By Deborah Stone, Brian Wiley, and Jessi Wyatt What is JavaScript? • JavaScript is a simple scripting language that can be embedded in the <head>/<body> of your web pages. Doing so you can create interactive web pages by adding features such as: – games – customized graphics – password protection – forms – special effects – and more What is a Scripting Language? • Scripting languages (aka scripting programming languages or script languages) are computer programming languages created to simplify the editcompile-link-run process. What's the difference between JavaScript and Java? • Although, Java is technically an interpreted programming language, it is coded in a similar fashion to C++ (which is a programming language. • JavaScript is much simpler to use than Java. No compiling, no applets, just a simple sequence. What can JavaScript do? JavaScript can do the following: • • • • • • • Give HTML designers a programming tool Put dynamic text into an HTML page React to events Read and write HTML elements Validate data Detect the visitor's browser Create cookies Sample Code: Password Protection JavaScripts go in either the <head> or <body> tag, otherwise they won’t work. <head> <script type="text/javascript"> Tells your web browser you’re using JavaScript <!-- Begin password; variable (password) that stores what you type correct = “mypassword”; variable (correct) that stores correct password (mypassword). password=prompt("Please enter your password:",""); the prompt that pops up. What you type in is stored in the variable “password”. if (password==correct) { IF statement; compares both variables window.location= "welcome.html"; file to open if password is correct } else { ELSE statement; what to do if passwords don’t match window.location= "not_welcome.html"; file to load if password is incorrect } // End --> </script> </head> Recap • JavaScript is a scripting language that can make your web pages interactive. • A scripting language is a computer programming language that can make your website interactive. • JavaScript & Java are totally different. – JavaScript is much simpler to use than Java. – Java is an interpreted programming language. • JavaScript can be used for a variety of things and you don’t have to know how to program to use it. You can even get them for free online. Additional Information You can get free JavaScripts and tutorials from the following websites: • http://javascript.internet.com/ • http://www.webteacher.com/javascript/ • http://www.w3schools.com/js/