EASY WAY TO FIND ANGLE BETWEEN TWO POINTS



Scripts are following below
//Get angle in radian.

//For convert radian to degree.
//Theta*180/PI

//For convert degree to radian.
//Theta*PI/180


alert(getAngle())//In Radian
alert(getAngle()*180/Math.PI)//In Degree


function getAngle(x1, y1, x2, y2){
var dx = x2 - x1;
var dy = y2 - y1;
return Math.atan2(dy,dx);
}