Javascript Error

I’m trying to use custom javascript on wordpress, it gives me error for this code:

function parameterizeCurveOpt(path, partArc, initialT) {
	var STEPS = 2000;
	var errRange = 0.00000001;
	var t = 1 / STEPS;
	var optt = (STEPS / NumOfTooths) * t;
	var aX=0;
	var aY=0;
	var bX=path[0], bY=path[1];
	var dX=0, dY=0;
	var dS = 0;
	var arrRes = null;
	var sumArc = 0;
	var arrT = new Array(Math.round(partArc)); ...

Uncaught RangeError: Invalid array length

but out of wordpress it’s working fine. Any suggestions?