introduction_to_javascript_part_2_ok_

INTRODUCTION TO JAVSCRIPT PART 2 (OK) Interaction In the first part of this guide, you learned how to use JavaScript, how to write code and how to see if it actually works. But that was all just basic stuff - in this second part we ll show you what... More

INTRODUCTION TO JAVSCRIPT PART 2 (OK) Interaction In the first part of this guide, you learned how to use JavaScript, how to write code and how to see if it actually works. But that was all just basic stuff - in this second part we ll show you what JavaScript is really used for in the real world and where it can really make a difference. Accessing page elements As we ve said before, JavaScript is primarily used for adding dynamic effects and user interactivity to your Web pages. One of the most important functions of JavaScript is to be able to access any element on the page. You can do this by creating a variable that represents that element. Then when you change the value of the variable, you are actually making changes to the element. For example, if you want to check the text that a user has entered into a textbox, you need to access the textbox through code and programmatically check its contents. You can also hide and reveal elements on the page, or animate the text in the Less