Using javascript to transfer values between Iframe and the child and parent pages _ javascript skills

I believe many of my friends have had this experience by using iframe as a system framework. Next I will introduce you to the value transfer application between Iframe in JS. If you are interested, refer to the following, I hope it will help you to use iframe as a system framework in js. In the subpage, the value transfer between parent pages is also a problem, the following is the js object for obtaining the Parent and Child forms:

1. Obtain the elements of the parent page from the iframe subpage.:
A> retrieve parent parent.doc ument, which is the object in the document of the parent page;
B> if you want to obtain the method in the parent page js: window. parent. xxxx (); xxxx () is the method;

2. Obtain the elements in the iframe subpage from the parent page.:
A>

The Code is as follows:

Var child = document. getElementByIdx_x ("mainFrame"). contentWindow; // the id of mainFrame is the id of iframe of the parent page.
Child.doc ument; // obtain the document object in the subpage;