代码触发js事件(click、change)示例应用

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');
}
}

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');
}
}