(修改后的版本使之无需prototype.js即可工作)
function simulate(element, eventName)
{
var options = extend(defaultOptions, arguments[2] || {});
var oEvent, eventType = null;
for (var name in eventMatchers)
{
if (eventMatchers[name].test(eventName)) { eventType = name; break; }
}
if (!eventType)
throw new SyntaxError('Only HTMLEvents and MouseEvents interfaces are supported');
if (document.createEvent)
{
oEvent = document.createEvent(eventType);
if (eventType == 'HTMLEvents')
{
oEvent.initEvent(eventName, options.bubbles, options.cancelable);
}
else
{
oEvent.initMouseEvent(eventName, options.bubbles, options.cancelable, document.defaultView,
options.button, options.pointerX, options.pointerY, options.pointerX, options.pointerY,
options.ctrlKey, options.altKey, options.shiftKey, options.metaKey, options.button, element);
}
element.dispatchEvent(oEvent);
}
else
{
options.clientX = options.pointerX;
options.clientY = options.pointerY;
var evt = document.createEventObject();
oEvent = extend(evt, options);
element.fireEvent('on' + eventName, oEvent);
}
return element;
}
function extend(destination, source) {
for (var property in source)
destination[property] = source[property];
return destination;
}
var eventMatchers = {
'HTMLEvents': /^(?:load|unload|abort|error|select|change|submit|reset|focus|blur|resize|scroll)$/,
'MouseEvents': /^(?:click|dblclick|mouse(?:down|up|over|move|out))$/
}
var defaultOptions = {
pointerX: 0,
pointerY: 0,
button: 0,
ctrlKey: false,
altKey: false,
shiftKey: false,
metaKey: false,
bubbles: true,
cancelable: true
}
您可以像这样使用它:
simulate(document.getElementById("btn"), "click");
请注意,作为第三个参数,您可以传入'options'。您未指定的选项取自defaultOptions(请参见脚本底部)。因此,例如,如果您想指定鼠标坐标,则可以执行以下操作:
simulate(document.getElementById("btn"), "click", { pointerX: 123, pointerY: 321 })
您可以使用类似的方法来覆盖其他默认选项。
应归功于kangax。这是原始来源(特定于prototype.js)。