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Understanding HTML Forms, Buttons, and JavaScript Functions, Study notes of Computer Science

University of South Carolina (USC) - Columbia Computer Science

The basics of creating interactive web pages using html forms, buttons, and javascript functions. It covers the declaration and usage of javascript functions, the properties of html form objects, and the creation of buttons using the input tag. It also includes examples of how the function is called when the button is clicked.

Typology: Study notes

Pre 2010

Uploaded on 09/02/2009

koofers-user-bkf 🇺🇸

10 documents

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Partial preview of the text

Download Understanding HTML Forms, Buttons, and JavaScript Functions and more Study notes Computer Science in PDF only on Docsity! Forms, Buttons, and JavaScript Functions <?xml version=“1.0”?> <!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www/w3/org/TR/xhtml/11/DTD/xhtml1-transitional.dtd”> <html xmlns=“http://www.w3.org/1999/xhtml”>  <head> <title> Forms, Buttons, and JavaScript Functions </title> <script type="text/javascript" > function hello(){ document.bgColor=“black” document.fgColor=“white” alert("Hello, welcome to my page!") } </script> </head> <body> <h1> Testing Forms </h1> <form id=“MyForm” name=“MyForm”> <input type=“button” value=“Click Me!” name=“MyButton” onclick= “hello()” /> </form> </body>  </html> function is used to declare a user created method (function). The function declaration must be inside a <script> tag. Functions are a portion of code that will only be executed when the function is called by name. This function’s name is hello(). The { starts the code to be executed and the } ends the function’s code. Properties of an object can be changed by loading a new value into it (i.e. object.property = newvalue ). REMEMBER: don’t forget the } to close the function!! The <form> tag allows for interaction with the web surfer. The <input /> tag goes within the <form> tag to determine the type of interaction. The <input /> tag allows for several different types of interaction with the web surfer. The type=“button” creates a button and has a few main attributes associated with it.  value is what will be displayed on the buttons face  name is the name of the input object (user created)  onclick is what will happen when the button is clicked on.

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