Fucntion如下：
xxx.setDocumentTitle = function(title) {document.title = title;if (/ip(hone|od|ad)/i.test(navigator.userAgent)) {var i = document.createElement('iframe');i.src = '/favicon.ico';i.style.display = 'none';i.onload = function() {setTimeout(function(){i.remove();}, 9)}document.body.appendChild(i);}}
