Mutual access between variables in the HTML parent window and IFRAME

Mutual access between variables in the HTML parent window and IFRAME

1. Access variables or functions in IFRAME in the HTML parent window

In the parent window script, write:

// Call variable assignment

IframeObj. contentWindow. someVar = "test is OK ";

// Call a function

IframeObj. contentWindow. someFunction ();

2. IFRAME in HTML accesses variables or functions in the parent window

Suppose there are methods in the parent window script:

Function showMsg (str ){

Alert ('read from iframe: '+ str );

}

In IFRAME, The showMsg () function of the parent window can be called as follows:

Var str = 'wahaha! ';

Window. parent. showMsg (str );