JavaScript to Calculate the angle between two points in degrees

Quick little snippet here for later reference (Yeah this one took me a bit to figure out).  The below function will return the angle between two points and return it in degrees from 0-360.



		function calcAngle(x1, x2, y1, y2)
		calcAngle = Math.atan2(x1-x2,y1-y2)*(180/Math.PI);	
		if(calcAngle < 0)	
		calcAngle = Math.abs(calcAngle);
		calcAngle = 360 - calcAngle;		
		return calcAngle;