JavaScript
Our web spider found the following code snippet at home_jlu_edu_cn and contains information about atan and JavaScript. 
atan(x,y));
dx = round(v * cos(degToRad(a)));
dy = round(v * sin(degToRad(a)));
this.moveBy(dx,dy);

setTimeout(this.name + ".slide(" + xx + "," + yy + ", '" + func + "');",10);    


if (menuCount==0 && document.all) document.all[this.ref].style.filter = 
"alpha (opacity=100)";
menuCount++;
return this;
var pi = Math.PI;
function square(x) { return (x*x); }
function sqrt(x) { return Math.sqrt(x); }
function round(x) { return Math.round(x); }
function rand(x,y) { return (round(Math.random()*(y-x)) + x); }
function cos(x) { return Math.cos(x) }
function sin(x) { return Math.sin(x) }
function degToRad(x) { return ( x/(360/(2*pi)) ); }
function radToDeg(x) { return ( x*(360/(2*pi)) ); }
function atan
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