accessing a form that is in an iframe

问题:

I'm trying to get access to a form and its elements. The form is within an iframe and the javascript code that is accessing the form is within the main document.

I'm not sure what else I should put into the question, so please let me know if I need to add something else.

(form and main page are in the same domain)

Thanks

回答1:

var ifr = document.getElementById( yourIframeId );
var ifrDoc = ifr.contentDocument || ifr.contentWindow.document;
var theForm = ifrDoc.getElementById( yourFormId );

Or you could have some code in the frame that sets a variable in parent to the form, but I wouldn't trust that method.

回答2:

If your iframe has a name attribute, that can be used as a window name. If the frame name is "myframe":

myframe.document.getElementById("myform") // gives you the form element