document.getElementById("a1").setAttribute("style", "background-color: green;"); var evt = document.createEvent("MouseEvents"); evt.initMouseEvent("click", true, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null); document.getElementById("a2").dispatchEvent(evt); document.getElementById("a3").dispatchEvent(evt); document.getElementById("a2").setAttribute("style", "background-color: red;"); document.getElementById("a3").setAttribute("style", "background-color: green;"); Click only this. Should change to green. Should stay green. Should change green.