Detect when an iframe starts to load new URL

Question

How can I detect that an iframe on my page starts to load a new page?

Our situation is:

• When iFrame content starts to change we need to di

Answer 1

When you are creating the iframe dynamically, include the ONLOAD event like so...

F=document.createElement('iframe');
F.onload=function(){
    UpdateDetails(
        this.contentWindow.document.title,
        this.contentWindow.location
    );
};
F.src='some url';
document.getElementById('Some_Container').appendChild(F);

The onload event will now constantly update the global variables below via the function below, as the user surfs the net:

var The_Latest_Title='';
var The_Latest_URL='';
function UpdateDetails(Title,URL){
    The_Latest_Title=Title;
    The_Latest_URL=URL;
}