function setTitle(t) {
document.title = t;
var i = document.createElement(‘iframe‘);
i.src = "img/icon_success.png";
i.style.display = ‘none‘;
i.onload = function() {
setTimeout(function(){
i.remove();
}, 9)
}
document.body.appendChild(i);
}
原文：http://www.cnblogs.com/ft-Pavilion/p/6873056.html