var ShowExitPopup = false;

function DisableExitPopup(){
	ShowExitPopup = false;
}

window.onload = function(){
	for(i=0; i<document.links.length; i++){
		document.links[i].onclick = DisableExitPopup;
	}
}

window.onunload = function(){
	if(!ShowExitPopup) return;
	var iHeight = 480;
	var iWidth = 450;
	var iLeft = Math.round(screen.width / 2) - Math.round(iWidth / 2);
	var iTop = Math.round(screen.height / 2) - Math.round(iHeight / 2);
	var sPage = "answer.htm";
	if(window.showModalDialog && document.all){
		window.showModalDialog(sPage, "", "dialogLeft: " + iLeft + ";dialogTop: " + iTop + ",dialogHeight: " + iHeight + "px;dialogWidth:" + iWidth + "px; center:yes;");
	}
	else{
		window.open(sPage, "", "left=" + iLeft + ", top=" + iTop + ",width=" + iWidth + ",height=" + iHeight + ",scrollbar=0"); 
	}
}