模拟鼠标事件

DOM

var btn = document.getElementById("myBtn");
 
 //创建事件对象
 var event = document.createEvent("MouseEvents");
 
 //初始化事件对象
 event.initMouseEvent("click", true, true, document.defaultView, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
 
 //触发事件
 btn.dispatchEvent(event);

IE

var btn = document.getElementById("myBtn");

//创建事件对象
var event = document.createEventObject();

//初始化事件对象
event.screenX = 100;
event.screenY = 0;
event.clientX = 0;
event.clientY = 0;
event.ctrlKey = false;
event.altKey = false;
event.shiftKey = false;
event.button = 0;

//触发事件
btn.fireEvent("onclick", event);