var mousemovin; var x = 0; var y = 0; function mousein(){ mousemovin = true; ingresox = window.event.x; ingresoy = window.event.y; } function movewin () { if (mousemovin == true && window.event.button == 1){ x = window.event.x - ingresox; y = window.event.y - ingresoy; top.window.moveBy(x,y); }else{ mousemovin = false } }