function whatif()
{
if (running == 1) {popup.close;}
}



var running = 1
remote = null;
function popup(page,opt){

    var bName = navigator.appName;
    var bVer = parseInt(navigator.appVersion); 
    if (running == 1)   {popup.close}
    else {running = 1}
    
    if (bName == "Netscape" && bVer >= 3){
    
        if (remote == null || remote.closed)
            remote = this.open(page, "popup", opt);     
        else
            remote.close()
            remote = this.open(page, "popup", opt);                 
    }else{
        remote = window.open("", "popup", opt)
        if (remote.opener == null) remote.opener = self;
        remote = window.open(page, "popup", opt)
    }
}