iframe（跨页面父子页面问题）

 <iframe id="iframe1" data-bind="attr: { src: $root.Basic_Form_ReportID }" frameborder="0" style="height: 550px;100%"></iframe>

self.CreatCustomCss = function (content) {
var oCss = document.getElementById("CustomCss");
oCss.innerHTML += content;
}

//注册Iframe加载完成事件,支持2个Iframe Start
var iframe = document.getElementById("iframe1");
if (iframe) {
if (iframe.attachEvent) {
iframe.attachEvent("onload", function () {
if (afterIfrma1Loaded) afterIfrma1Loaded();
});
} else {
iframe.onload = function () {
if (afterIfrma1Loaded) afterIfrma1Loaded();
};
}
}

//加载自定义样式
document.write("<style id='CustomCss'></style>");

function afterIfrma1Loaded() {
var css = ".inblock2{33% !important}";

document.getElementById("iframe1").contentWindow.viewModel.CreatCustomCss(css)
}