定义5000毫秒变量成jiuaiscript setTimeoutfunction documentgetElementByIdinfrmstyledisplay = block; documentgetElementsByTagNamediv0styledisplay = none; 5000;script

var jiuai = setTimeout(function(){ document.getElementById("infrm").style.display = "block"; document.getElementsByTagName("div")[0].style.display = "none"; }, 5000);