function openwin(url, width, height) {
	var name = "popup"; // popup name
	var width = width; // popup width
	var height = height; // popup height
	var left = (screen.width - width) / 2 ;
	var top = (screen.height - height) / 2;
	var windowproperties = "width="+width+",height="+height+",left="+left+",top="+top+",scrollbars=1";
	window.open(url, name, windowproperties);
}
function displayLayer(which) { 
	obj = document.getElementById(which);
	obj.style.display == "block" ? obj.style.display = "none" : obj.style.display = "block";
}
var popupwin = null;
function popupWin(url,name) {
	popupwin = window.open(url,name,'width=600,height=400');
}
if (!document.all) {
	document.captureEvents (Event.CLICK);
}
document.onclick = function() {
	if (popupwin != null && !popupwin.closed) {
		popupwin.focus();
	}
}