Animated Javascript Seaweed - make your web page into an underwater world

SLITHERY SEAWEED EFFECT

This script has been tested on and shown to work with the following browsers: Internet Explorer version 7 and above Google Chrome version 4 and above Mozilla Firefox version 2 and above Apple Safari version 5 and above Opera version 9 and above (including Opera mobile) Android Browser version 3 and above Warning: This script is very processor intensive and may run slowly on older computers.

23-Aug-2012: Performance improvements. 05-Aug-2012: First release.
STEP 1: Copy and paste the code below so that it sits between the <head> and </head> tags at the top of your web-page: <script type="text/javascript"> // <![CDATA[ var speed=40; // lower number for faster animation var colour="#6600ff"; // colour of weed var fronds=6; // how many fronds of seaweed, the more there are the slower the script runs var flength=0.66; // maximum height of the fronds compared to the screen height. 0.5 is half way to the top var fobble=6; // how much do the fronds wobble (8 is about the maximum sensible) var girth=40; // how thick are the fronds in pixels /**************************\ Slithery Seaweed Effect * (c)2012-12 mf2fm web-design * http://www.mf2fm.com/rv * * DON'T EDIT BELOW THIS BOX * \**************************/ var fron=new Array(); var frox=new Array(); var frod=new Array(); var frop=new Array(); var froa=new Array(); var frob=new Array(); var swide, shigh; function addLoadEvent(funky) { var oldonload=window.onload; if (typeof(oldonload)!='function') window.onload=funky; else window.onload=function() { if (oldonload) oldonload(); funky(); } } addLoadEvent(slither); function inArray(needle, haystack) { var i; for (i=0; i<haystack.length; i++) { if (haystack[i]==needle) return true; } return false; } function slither() { if (document.getElementById) { var i, f, w, x=new Array(); set_width(); for (f=0; f<fronds; f++) { fron[f]=new Array(); frod[f]=new Array(); frox[f]=new Array(); frop[f]=0; froa[f]=0.03+0.03Math.random(); do { i=Math.floor(girth/2(2+Math.floor(2(swide/girth-4)Math.random()))); } while ( inArray(i, x) ) x[f]=i; frob[f]=createDov(x[f]); document.body.appendChild(frob[f]); } for (f=0; f<fronds; f++) { h=Math.floor(shigh/2flength(0.66+0.33Math.random())); for (i=0; i<=h; i++) { w=2Math.floor(girth/2Math.sin(2.2i/h)); frod[f][i]=0; frox[f][i]=Math.floor(girth-w/2); fron[f][i]=createDuv(w, frox[f][i], -2(i-h)); frob[f].appendChild(fron[f][i]); } wavy_seaweed(f, i); } }} function createDov(left) { var d, s; d=document.createElement("div"); s=d.style; s.position="fixed"; s.bottom="0px"; s.left=left+"px"; s.overflow="visible"; s.width=2girth+"px"; s.height=swideflength+"px"; s.backgroundColor="transparent"; s.zIndex="998"; if (navigator.appName!="Microsoft Internet Explorer") s.opacity="0.66"; return (d); } function createDuv(width, left, bottom) { var d, s; d=document.createElement("div"); s=d.style; s.position="absolute"; s.height="2px"; s.width=width+"px"; s.left=left+"px"; s.bottom=bottom+"px"; s.overflow="hidden"; s.backgroundColor=colour; if (navigator.appName=="Microsoft Internet Explorer") s.filter="alpha(opacity=66)"; return (d); } function wavy_seaweed(f, h) { var i, x, s; s=hh/fobble; frod[f][h-2]=Math.sin(frop[f]); fron[f][h-2].style.left=frox[f][h-2]+frod[f][h-2]+"px"; frop[f]+=froa[f]+Math.random()0.005; if (Math.random()>.95) { froa[f]=froa[f]-0.015+0.03Math.random(); if (froa[f]<0.03) froa[f]=0.03; if (froa[f]>0.08) froa[f]=0.08; } for (i=0; i<h-2; i++) { x=(1+i/s)frod[f][i+1]; if (Math.floor(x)!=Math.floor(frod[f][i])) fron[f][i].style.left=frox[f][i]+Math.floor(x)+"px"; frod[f][i]=x; } setTimeout('wavy_seaweed('+f+','+h+')', speed); } window.onresize=set_width; function set_width() { var sw_min=999999; var sh_min=999999; if (document.documentElement && document.documentElement.clientWidth) { if (document.documentElement.clientWidth>0) sw_min=document.documentElement.clientWidth; if (document.documentElement.clientHeight>0) sh_min=document.documentElement.clientHeight; } if (typeof(self.innerWidth)=='number' && self.innerWidth) { if (self.innerWidth>0 && self.innerWidth<sw_min) sw_min=self.innerWidth; if (self.innerHeight>0 && self.innerHeight<sh_min) sh_min=self.innerHeight; } if (document.body.clientWidth) { if (document.body.clientWidth>0 && document.body.clientWidth<sw_min) sw_min=document.body.clientWidth; if (document.body.clientHeight>0 && document.body.clientHeight<sh_min) sh_min=document.body.clientHeight; } if (sw_min==999999 \|\| sh_min==999999) { sw_min=800; sh_min=600; } swide=sw_min; shigh=sh_min; } // ]]> </script> CLICK HERE to select the above script ready to paste it into your clipboard
STEP 2: Change the colour (and other parameters) at the start of the script you just copied to the settings you require (you probably want green seaweed, not the purple stuff on this page!)
THAT'S IT When your page loads, there should be seaweed waving about in the underwater currents just like on this page.

Copyright notice: All scripts are © copyright mf2fm.com. You can use them wherever and whenever you wish, however the copyright notice at the start of the script should remain intact and a link back to this page would be appreciated. The address for this page is: http://www.mf2fm.com/rv/dhtmlseaweed.php.

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