p').click(function(){ var frame = document.getElementById('ifra'); frame.contentWindow.postMessage({clk: true, info_src: 11},'*'); }) function changeBg(i) { // console.log(i) window.addEventListener('message', function (event) { //此处执行事件 if (!event.data.iframe) { i.style.display = 'none' return } if (event.data.modal) { i.style.width = '100%' i.style.height = '100%' } else { i.style.width = '148px' i.style.height = '108px' } }) } -->