//Passing URL to Iframe
function iffffff() {

    var IFrame = Xrm.Page.ui.controls.get( "IFRAME_iframes" );
    //url value will  be saved in Url variable
    var Url = IFrame.getSrc();
    alert(Url);
    //add new url or add subs to the existing
    var trget = Url + "/movie" ;
    alert(trget);
    //set new value to iframe
    IFrame.setSrc(trget);
    //test what is new url
    var IFramee = Xrm.Page.ui.controls.get( "IFRAME_iframes" );

    var Urls = IFrame.getSrc();
    alert(Urls);
}

















SOURCE : JUST2CODE.IN
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