Javascript 模拟点击事件(点击链接与html点击) 兼容IE/Firefox_javascript技巧

try {
// create a element so that HTMLAnchorElement is accessible
document.createElement('a');
HTMLElement.prototype.click = function () {
if (typeof this.onclick == 'function') {
if (this.onclick({type: 'click'}) && this.href)
window.open(this.href, this.target? this.target : '_self');
}
else if (this.href)
window.open(this.href, this.target? this.target : '_self');
};
}
catch (e) {
// alert('click method for HTMLAnchorElement couldn\'t be added');
}

try {
// create span element so that HTMLElement is accessible
document.createElement('span');
HTMLElement.prototype.click = function () {
if (typeof this.onclick == 'function')
this.onclick({type: 'click'});
};
}
catch (e) {
// alert('click method for HTMLElement couldn\'t be added');
}

function doClick(linkId, e){
if(e.keyCode != 13){
return;
}
var fireOnThis = document.getElementById(linkId)
if (document.createEvent)
{
var evObj = document.createEvent('MouseEvents')
evObj.initEvent( 'click', true, false )
fireOnThis.dispatchEvent(evObj)
}
else if (document.createEventObject)
{
fireOnThis.fireEvent('onclick')
}
}