javascript - Triggering Instance methods by firing the Parent method -

what best way fire method in many children calling parent's method?

for example, lets have parent object foo has many instances: barx, bary, etc.

foo = function(){    x = null;    y = null;    move = function(){       x += 1;       y += 1;    }; }  barx = new foo(); barx.x = 50; barx.y = 50;  bary = new foo(); bary.x = 200; bary.y = 200;  

is there easy way fire off move function in instances? limited looping through instances , firing off function or can somehow fire function in foo , have trickle down , fire off instances extend foo?

no. more clever it. make static moveall function on foo. examples make things clearer. here fiddle.

var foo = function(x, y){    this.x = x;    this.y = y;    this.move = function(){       x += 1;       y += 1;       alert(x + ' ' + ' ' + y);    };    foo.instances.push(this); // add instance foo collection on init }; foo.instances = []; foo.moveall = function(){     for(var = 0; < foo.instances.length; i++)         foo.instances[i].move(); }  var = new foo(5, 6); var b = new foo(3, 4);  foo.moveall();