Cross window communication. The Same Origin same site policy limits access of windows and frame to each other. The idea is that if we have two windows open one from john smith. Two URLs are said to have the same origin if they have the same protocol, domain and port. These URLs all share the same origin http site. These ones do not http www. If we have a reference to another window a popup or iframe, and that window comes from the same origin, then we can do everything with it. If it comes from another origin, then we can only change its location. Please note not read the location, but modify it, redirect it to another place. Thats safe, because the URL may contain sensitive parameters, so reading it from another origin is prohibited, but changing is not. Install Outlook From Exchange Server more. X/6/69e9d9c5db823ed61879a98420a19fe23bee1a25.png' alt='Change Url Of Parent Window From Iframe Html' title='Change Url Of Parent Window From Iframe Html' />Also such windows windows may exchange messages. Soon about that later. Exclusion subdomains may be same origin. Theres an important exclusion in the same origin policy. If windows share the same second level domain, for instance john. Java. Script to assign to document. SvGHsgQRdD4/TuYkTl6GsNI/AAAAAAAAAH8/Fc3SNnwEReM/s400/prevent-iframe-load.jpg' alt='Change Url Of Parent Window From Iframe Html' title='Change Url Of Parent Window From Iframe Html' />Var url window. I found that the above example suggested previously worked when the. Hi experts, I do have a page with 6 different iframes and would like to control from the parent window the history back function of each iframe separated. Seems like this a very popular mini script Ive used it for a while now and the results are great. One question, of course. You pass the child the parents URL right. Accessing an iframe contents. An ltiframe is a twofaced beast. From one side its a tag, just like ltscript or ltimg. From the other side its a windowinwindow. Forums/getfile/1084102' alt='Change Url Of Parent Window From Iframe Html' title='Change Url Of Parent Window From Iframe Html' />Then these windows are treated as having the same origin. In other words, all such documents including the one from site. Then they can interact without limitations. Thats only possible for pages with the same second level domain. An lt iframe is a two faced beast. From one side its a tag, just like lt script or lt img. From the other side its a window in window. The embedded window has a separate document and window objects. We can access them like using the properties iframe. Window is a reference to the window inside the lt iframe. Document is a reference to the document inside the lt iframe. When we access an embedded window, the browser checks if the iframe has the same origin. If thats not so then the access is denied with exclusions noted above. For instance, heres an lt iframe from another origin lt iframe srchttps example. Window iframe. content. Window. but not to the document inside it. Document. catche. Security Error another origin. URL of the page in it. Window. location. Security Error. Window. The code above shows errors for any operations except Getting the reference to the inner window iframe. Window. Changing its location. Window. onload. The iframe. Window. onload. It triggers when the embedded window fully loads with all resources. But iframe. Window. And now an example with the same origin. We can do anything with the embedded window lt iframe src idiframe lt iframe. Reader Rabbit Grade 2. Document. body. prependHello, world. When an iframe is created, it immediately has a document. But that document is different from the one that finally loads into it Here, look lt iframe src idiframe lt iframe. Doc iframe. content. Document. iframe. Doc iframe. content. Document. the loaded document is not the same as initial Doc new. Doc false. Thats actually a well known pitfall for novice developers. We shouldnt work with the document immediately, because thats the wrong document. If we set any event handlers on it, they will be ignored. But the onload event triggers when the whole iframe with all resources is loaded. What if we want to act sooner, on DOMContent. Loaded of the embedded document Thats not possible if the iframe comes from another origin. But for the same origin we can try to catch the moment when a new document appears, and then setup necessary handlers, like this lt iframe src idiframe lt iframe. Doc iframe. content. Document. every 1. Interval. Document old. Doc return. Document. Event. ListenerDOMContent. Game Prime World Defenders Full Throttle. Loaded,. Document. Hello, world. Intervaltimer cancel set. Interval, dont need it any more. Let me know in comments if you know a better solution here. An alternative way to get a window object for lt iframe is to get it from the named collection window. By number window. By name window. frames. Name the window object for the frame with nameiframe. Name. For instance lt iframe src styleheight 8. Window frames0 true. Window frames. An iframe may have other iframes inside. The corresponding window objects form a hierarchy. Navigation links are window. For instance window. We can use the top property to check if the current document is open inside a frame or not if window top current window window. The script is in the topmost window, not in a frame. The script runs in a frame. The sandbox attribute allows to forbid certain actions inside an lt iframe, to run an untrusted code. It sandboxes the iframe by treating it as coming from another origin andor applying other limitations. By default, for lt iframe sandbox src. But we can provide a space separated list of excluded limitations as a value of the attribute, like this lt iframe sandboxallow forms allow popups. The listed limitations are not applied. In other words, an empty sandbox attribute puts the strictest limitations possible, but we can put a space delimited list of those that we want to lift. Heres a list of limitations allow same origin. By default sandbox forces the different origin policy for the iframe. In other words, it makes the browser to treat the iframe as coming from another origin, even if its src points to the same site. With all implied restrictions for scripts. This option removes that feature. Allows the iframe to change parent. Allows to submit forms from iframe. Allows to run scripts from the iframe. Allows to window. See the manual for more. The example below demonstrates a sandboxed iframe with the default set of restrictions lt iframe sandbox src. It has some Java. Script and a form. Please note that nothing works. So the default set is really harsh lt UTF 8. The iframe below is has lt code sandboxlt code attribute. UTF 8. lt button onclickalert1. Click to run a script doesnt worklt button. Submit doesnt work. The purpose of the sandbox attribute is only to add more restrictions. It cannot remove them. In particular, it cant relax same origin restrictions if the iframe comes from another origin. The post. Message interface allows windows to talk to each other no matter which origin they are from. It has two parts. The window that wants to send a message calls post. Message method of the receiving window. In other words, if we want to send the message to win, we should call win. Messagedata, target. Origin. Arguments data. The data to send. Can be any object, the data is cloned using the structured cloning algorithm. IE supports only strings, so we should JSON. Origin. Specifies the origin for the target window, so that only a window from the given origin will get the message. The target. Origin is a safety measure. Remember, if the target window comes from another origin, we cant read its location. So we cant be sure which site is open in the intended window right now the user could navigate away. Specifying target. Origin ensures that the window only receives the data if its still at that site. Good when the data is sensitive. For instance, here win will only receive the message if it has a document from the origin http example. Messagemessage, http example. If we dont want that check, we can set target. Window parent Property Window Object. Example. Change the background color of an lt iframe elements parent document. Color red. Try it Yourself Definition and Usage. The parent property returns the parent window of the current window. This property is read only. Browser Support. Propertyparent. Yes. Yes. Yes. Yes. Yes. Syntax. window. Technical Details. Return Value The parent window object of the current window. More Examples. Example. Alert the location of the parent window when opening a new window. Try it Yourself Window Object.