Chrome, Firfox does not support fireEvent’s methods Instead, use the method dispatchEvent to give a compatible Code directly.

Click event

function simulateClick(el) {
var evt;
if (document.createEvent) { // DOM Level 2 standard
evt = document.createEvent("MouseEvents");
evt.initMouseEvent("click", true, true, window,
0, 0, 0, 0, 0, false, false, false, false, 0, null);
el.dispatchEvent(evt);
} else if (el.fireEvent) { // IE
el.fireEvent('onclick');
}
}

Drag event

function simulateDrag(el) {
var evt;
if (document.createEvent) { // DOM Level 2 standard
evt = document.createEvent("MouseEvent");
evt.initMouseEvent("dragstart", true, true, window,
0, 0, 0, 0, 0, false, false, false, false, 0, null);
el.dispatchEvent(evt);
} else if (el.fireEvent) { // IE
el.fireEvent('ondragstart');
}
}