Document fire works script
Note: Modified significantly by Dynamicdrive.com to render fireworks on entire page
Description: Use this script to add a subtle-yet stunning- fireworks effect to your webpage! The effect appears randomly at different locations on the page, always visible, however, even if the user scrolls the page.
Demo: It's all around you, all around you...
Directions 
Step 1: Add the following script and stylesheet code to the <head> section of your page:
Step 2: Add the below <div> tags to the <body> section of your document:
<div id="sDiv0">*</div> <div id="sDiv1">*</div> <div id="sDiv2">*</div> <div id="sDiv3">*</div> <div id="sDiv4">*</div> <div id="sDiv5">*</div> <div id="sDiv6">*</div>
Technical Note
This script accesses the BODY onload event (window.onload). If you have another script on your page that does the same, one of them will not run. Click here for information on getting both scripts to work simultaneously.