Systemowe okienko popup

[Pozycjoner.pro]

Jak zrobić, żeby przy próbie zamknięcia ze strony, pojawiało się systemowe okienko popup z linkiem do innej strony ?

coś jak tutaj https://naturecleanse.org

[stat4seo]

Wszystko jest w źródle strony - ale działa chyba tylko pod IE :

<script type="text/javascript">

<!--

function doClick() {



}



history.forward();



function bunload() {

	window.onbeforeunload = null;



	alert("WAIT!!!!\n\nDid you know that you can get a completely free bottle of Nature Cleanse? All you have to do is fill out your address and pay $5.95 shipping and handling!\n\nRemember that the toxins inside of your colon could be eating you away from the inside out. Eliminate the danger by using Nature Cleanse to flush out parasites, worms, and excess waste that has built up over the years.\n\n Simply click 'Cancel' to claim the free bottle of Nature Cleanse that is awaiting you!");

	window.location = "https://www.proceedto.info/naturecleanse";

	return "\nClick *Cancel* below to see the proof that convinced even me.\n\n";





}







window.onbeforeunload = bunload;



//-->
var backButtonPressed = 1;	

function sortList() {
	backButtonPressed=0;
	document.form2.hiddenFieldName.name='sortButton';
	document.form2.submit();
}


function printSelectedEntry() {
	backButtonPressed=0;
	document.form2.hiddenFieldName.name='printButton';
	document.form2.submit();
}


function cancel() {
	backButtonPressed=0;
 	document.form2.hiddenFieldName.name='cancelButton';
	document.form2.submit();
}


function help() {
	backButtonPressed=0;
	document.form2.hiddenFieldName.name='helpButton';
	document.form2.submit();
}


function goBack() {
	if (backButtonPressed == 1) {
		backButtonWasPressed();
	}
}


function backButtonWasPressed() {
	cancel();
}


</script>