Method of transferring values ​​between Iframes in JS_javascript skills

1. Get the elements of the parent page in the iframe sub-page:

a>window.parent.document is to get the object in the parent page document;

b> If you want to get the method in the parent page js: window.parent.xxxx(); xxxx() is a method;

2. Get the elements in the iframe subpage in the parent page:

a>

var child = document.getElementByIdx_x("mainFrame").contentWindow;//mainFrame id is the id of the parent page iframe

child.document;//Get the document object in the child page;