Let use this multiple select script if you want to create select boxes that relate to anothers, by onchange event. Choose a value in the first select options and the script will precess and display the available select values in the second box to match your selection automatically. Easy to use, with full comments in source code.

You can also see more for multiple select, dynamic dropdown,...

This function script will return an array of tags based on DOM element, tag, and class name. For example, getElementsByClassName(document, 'tr', 'info') will return to you an array of all "tr" tags under the document node having the "info" class.

Add this JavaScript into your website for checking download speed, it will estimate the necessary time to dowload a file with several different download speeds, connection types and internet speeds, speed bandwidths. Very easy to customize and use, check download speed. Try it now!

Use this JavaScript to make sentence words that users enter correctly, meaning the beginning of each sentence is capitalized, the rest of the sentence is lower case, if they are not proper noun. Let enter some word sentences, sentence examples to test it.

Use this script to manage the dependency fields on your web, meaning you can hide/display some fields by changing values of others; not meant to replace your server scripting process. Please preview the script and read document.

This script uses className to make drag and drop feature for objects as dragable div, dragable layer. Very easy to use and customize.

This code uses innerHTML property to change the text of some object, in this example is links.

This script is a JavaScript example for locking some button by using disabled property.

Use this script to prevent users from entering characters which are not numbers.

This is another script, similar to Collapsible Navigation Menus to display/hide related content just by one click, of course just one data page, subject is open each time. However, design in this script is not better.