I've used an Iframe to show login page from another site. when the user entered the user and password, i want instead of opening the result login window in "iframe", it be opened in a different window. my solution is when the user is loginned, i take the current URL of :iframe", if it is the opposite of its SRC, my windows location be equale to current URl of "iframe"
 <iframe id="neturl" src="http://www.anotherSite.com/Login.aspx" onLoad="ChangeUrl();"  ></iframe>
I use javascript for find Current url of IFrame, But when i use this script i get error Permission denied to access property 'href'.
 function ChangeUrl()
   {
    var frame=   document.getElementById('neturl');
    alert(frame.src);
   }
but How to get Current url or understand that url changed?
 
    