JS1k: The JavaScript code golfing competition

var a=300;var b=0;var c=300;var d=1;var e=-0.1;var f=0.9;var g=0.05;var h=20;var d2=1;var e2=-0.3;var f2=0.1;var g2=0.03;var h2=25;var j=300;var k=100;function l(){setTimeout("m()",f)}function m(){var decalex=0;for(var i=0;i<j;i++){document.getElementById("d"+i).style.left=k+decalex+Math.round((Math.sin(d-(i*g))*h)+(Math.sin(d2-(i*g2))*h2))+"px";document.getElementById("dd"+i).style.left=k+decalex+Math.round((Math.cos(d-(i*g))*h)+(Math.cos(d2-(i*g2))*h2))+"px";decalex=decalex+0.5}d=d+e;d2=d2+e2;setTimeout("m()",f)}document.open();while(b<a){document.write("<div id='d"+b+"' style='width:"+c+"px;height:1px;position:absolute;background-color:#555555;margin-top:"+b+"px;'></div>");document.write("<div id='dd"+b+"' style='width:"+c+"px;height:1px;position:absolute;background-color:#999999;margin-top:"+b+"px;opacity:0.5;'></div>");++b;--c}document.close();l();

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var nblines=300;
var compteur=0;
var width=300;

// Sinus 1
var sin_position_x=1 ;
var sin_amplitude_x=-0.1 ;
var frequence=0.9 ;
var ecart_x=0.05 ;
var multiplicateur_x=20 ;

// Sinus 2
var sin_position_x2=1 ;
var sin_amplitude_x2=-0.3 ;
var frequence2=0.1 ;
var ecart_x2=0.03 ;
var multiplicateur_x2=25 ;

var nombre_div=300;

var divx=100 ;


function init() {
	setTimeout("movedivs()",frequence);
}

function movedivs() {

	var decalex=0 ;
	for(var i=0; i<nombre_div;i++){
		document.getElementById("div"+i).style.left=divx+decalex+Math.round((Math.sin(sin_position_x-(i*ecart_x))*multiplicateur_x)+(Math.sin(sin_position_x2-(i*ecart_x2))*multiplicateur_x2))+"px";
		document.getElementById("divdiv"+i).style.left=divx+decalex+Math.round((Math.cos(sin_position_x-(i*ecart_x))*multiplicateur_x)+(Math.cos(sin_position_x2-(i*ecart_x2))*multiplicateur_x2))+"px";
		decalex=decalex+0.5 ;
	}

	sin_position_x=sin_position_x+sin_amplitude_x ;
	sin_position_x2=sin_position_x2+sin_amplitude_x2 ;


	setTimeout("movedivs()",frequence);

}

document.open();
while (compteur<nblines) {
	document.write("<div id='div"+compteur+"' style='width:"+width+"px;height:1px;position:absolute;background-color:#555555;margin-top:"+compteur+"px;'></div>");
	document.write("<div id='divdiv"+compteur+"' style='width:"+width+"px;height:1px;position:absolute;background-color:#999999;margin-top:"+compteur+"px;opacity:0.5;'></div>");
	++compteur;
	--width;
}
document.close();

init();