代码如下: //初始化导航背景,iframe容器 function fnDaoHangBg() { var h = fnGetHeight(),w = fnGetWidth();//获取背景窗口大小 if(!$(‘divDaoHangBg’)) { var div = $C(‘div’);//创建背景蒙板 div.id = ‘divDaoHangBg’; div.style.backgroundColor = ‘black’; div.style.position = ‘absolute’; div.style.filter = ‘alpha(opacity=80)’; div.style.o