GWT back button browser

Question

For example current page is www.google.com. But I typed a different website address in address bar and clicked. This site has fully GWT code.

But I like to back to t

Answer 1

you also can use this native code

 public native void call()/*-{

    $wnd.onkeydown = GetChar;

     function GetChar (event)
     {
        var key = event.keyCode;

        var bb = event.target.nodeName;

        if(key==8 && bb=="BODY")//checking keyCode of key for backspace
                {
                    var x= window.confirm("Are you sureyou want to leave the page");

                    if (x==true)
                            {
                                window.history.back();
                            }
                    else if(x==false)
                            {

                                return false;
                            }
                }
        }                   
}-*/;